#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); ++i)
#define all(x) (x).begin(),(x).end()
#define ln '\n'
constexpr long long MOD = 1000000007LL;
//constexpr long long MOD = 998244353LL;
typedef long long ll;
typedef unsigned long long ull; 
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
template<class T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true;} return false; }
template<class T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true;} return false; }
///////////////////////////////////////////////////////////////////////////////////////////////////

template<typename T>
struct edge {
    int src,to;
    T cost;

    edge() = default;
    edge(int to, T cost) : src(-1), to(to), cost(cost) {}
    edge(int src, int to, T cost) : src(src), to(to), cost(cost) {}
    bool operator<(const edge &e) const {
        return cost < e.cost;
    }
};

template<typename T, typename Monoid>
struct SegmentTree {
    T unity;
    Monoid merge;
    int N;
    vector<T> node;

    SegmentTree(Monoid f, T id) : merge(f), unity(id) {}

    void init(int sz) {
        N = 1;
        while (N < sz) N *= 2;
        node.assign(2*N,unity);
    }

    void set(int k, const T &val) {node[k+N] = val;}

    void build() {
        for (int i = N-1; i > 0; --i) {
            node[i] = merge(node[i<<1|0], node[i<<1|1]);
        }
    }

    // (0-indexed)
    void update(int x, T val) {
        x += N;
        node[x] = val;
        while (x > 1) {
            x >>= 1;
            node[x] = merge(node[x<<1|0], node[x<<1|1]);
        }
    }

    // [l, r) (0-indexed)
    T get(int l, int r) {
        if (l >= r) return unity;
        T resl = unity, resr = unity;
        l += N; r += N;
        while (l < r) {
            if (l & 1) resl = merge(resl, node[l++]);
            l >>= 1;
            if (r & 1) resr = merge(node[--r], resr);
            r >>= 1;
        }
        return merge(resl, resr);
    }

    T operator[](int x) {return node[x+N];}
};

/*
example
auto f=[](int a,int b){return max(a,b);};
const int id = -1e9;
SegmentTree<int, decltype(f)> seg(f,id);
*/

struct HeavyLightDecomposition {
    vector<vector<int>> G;
    vector<int> vid, head, sub, par, dep, inv, type;

    HeavyLightDecomposition(int N) :
        G(N),vid(N,-1),head(N),sub(N,1),
        par(N,-1),dep(N,0),inv(N),type(N){}

    void add_edge(int u,int v) {
        G[u].emplace_back(v);
        G[v].emplace_back(u);
    }

    void build(vector<int> rs={0}) {
        int c=0,pos=0;
        for(int r:rs) {
            dfs_sz(r);
            head[r]=r;
            dfs_hld(r,c++,pos);
        }
    }

    void dfs_sz(int v) {
        for(int &u:G[v]) if(u==par[v]) swap(u,G[v].back());
        if(~par[v]) G[v].pop_back();
        for(int &u:G[v]) {
            par[u]=v;
            dep[u]=dep[v]+1;
            dfs_sz(u);
            sub[v]+=sub[u];
            if(sub[u]>sub[G[v][0]]) swap(u,G[v][0]);
        }
    }

    void dfs_hld(int v,int c,int &pos) {
        vid[v]=pos++;
        inv[vid[v]]=v;
        type[v]=c;
        for(int u:G[v]){
            if(u==par[v]) continue;
            head[u]=(u==G[v][0]?head[v]:u);
            dfs_hld(u,c,pos);
        }
    }

    int lca(int u,int v){
        while(1){
            if(vid[u]>vid[v]) swap(u,v);
            if(head[u]==head[v]) return u;
            v=par[head[v]];
        }
    }

    int distance(int u,int v){
        return dep[u]+dep[v]-2*dep[lca(u,v)];
    }

    // for_each(vertex)
    template<typename F>
    void for_each(int u, int v, const F& f) {
        while(1){
            if(vid[u]>vid[v]) swap(u,v);
            f(max(vid[head[v]],vid[u]),vid[v]+1);
            if(head[u]!=head[v]) v=par[head[v]];
            else break;
        }
    }

    template<typename T,typename Q,typename F>
    T for_each(int u,int v,T ti,const Q &q,const F &f){
        T l=ti,r=ti;
        while(1){
            if(vid[u]>vid[v]){
                swap(u,v);
                swap(l,r);
            }
            l=f(l,q(max(vid[head[v]],vid[u]),vid[v]+1));
            if(head[u]!=head[v]) v=par[head[v]];
            else break;
        }
        return f(l,r);
    }

    // for_each(edge)
    // [l, r) <- attention!!
    template<typename F>
    void for_each_edge(int u, int v,const F& f) {
        while(1){
            if(vid[u]>vid[v]) swap(u,v);
            if(head[u]!=head[v]){
                f(vid[head[v]],vid[v]+1);
                v=par[head[v]];
            }else{
                if(u!=v) f(vid[u]+1,vid[v]+1);
                break;
            }
        }
    }
};

using Tu = tuple<int, int, int, int, int>;
int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    int N,Q; cin >> N >> Q;
    HeavyLightDecomposition HLD(N);
    vector<vector<edge<ll>>> A(N-1);
    rep(i,N-1) {
        int a,b,c,d; cin >> a >> b >> c >> d;
        --a; --b; --c;
        A[c].emplace_back(a,b,d);
        HLD.add_edge(a,b);
    }
    HLD.build();
    vector<Tu> B(Q);
    rep(i,Q) {
        int x,y,u,v; cin >> x >> y >> u >> v;
        --x; --u; --v;
        B[i] = make_tuple(x,y,u,v,i);
    }
    sort(all(B));

    auto f=[](ll a, ll b) {return a+b;};
    const ll id = 0;
    SegmentTree<ll, decltype(f)> seg1(f,id),seg2(f,id);
    seg1.init(N);
    seg2.init(N);
    rep(i,N-1) {
        for (auto &e : A[i]) {
            if (HLD.dep[e.src] > HLD.dep[e.to]) swap(e.src,e.to);
            seg1.set(HLD.vid[e.to],e.cost);
        }
    }
    seg1.build();
    seg2.build();

    int cur = -1;
    vector<ll> ans(Q);
    rep(i,Q) {
        int x,y,u,v,id;
        tie(x,y,u,v,id) = B[i];
        if (cur != x) {
            if (cur != -1) {
                for (auto &e : A[cur]) {
                    seg1.update(HLD.vid[e.to],e.cost);
                    seg2.update(HLD.vid[e.to],0);
                }
            }
            cur = x;
            for (auto &e : A[cur]) {
                seg1.update(HLD.vid[e.to],0);
                seg2.update(HLD.vid[e.to],1);
            }
        }

        auto g=[&](int u, int v){ans[id] += seg1.get(u,v)+seg2.get(u,v)*y;};
        HLD.for_each_edge<decltype(g)>(u,v,g);
    }

    for (auto i : ans) cout << i << ln;
}


Measured memory_bytes: 23668