/*بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيم*/

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2,fma")

#include <bits/stdc++.h>
using namespace std;
#define FASTIO ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
typedef long long ll;
const double PI = acos(-1.0);
const ll mod = 1e9 + 7;
//const ll mod = 998244353;


inline void normal(ll &a) { a %= mod; (a < 0) && (a += mod); }
inline ll modMul(ll a, ll b) { a %= mod, b %= mod; normal(a), normal(b); return (a * b) % mod; }
inline ll modAdd(ll a, ll b) { a %= mod, b %= mod; normal(a), normal(b); return (a + b) % mod; }
inline ll modSub(ll a, ll b) { a %= mod, b %= mod; normal(a), normal(b); a -= b; normal(a); return a; }
inline ll modPow(ll b, ll p) { ll r = 1; while (p) { if (p & 1) r = modMul(r, b); b = modMul(b, b); p >>= 1; } return r; }
inline ll modInverse(ll a) { return modPow(a, mod - 2); }
inline ll modDiv(ll a, ll b) { return modMul(a, modInverse(b)); }

#define si(x) scanf("%d",&x)
#define sii(x,y) scanf("%d %d",&x,&y)
#define siii(x,y,z) scanf("%d %d %d",&x,&y,&z)
#define sl(x) scanf("%lld",&x)
#define sll(x,y) scanf("%lld %lld",&x,&y)
#define slll(x,y,z) scanf("%lld %lld %lld",&x,&y,&z)
#define ss(ch) scanf("%s",ch)
#define pi(x) printf("%d",x)
#define pii(x,y) printf("%d %d",x,y)
#define piii(x,y,z) printf("%d %d %d",x,y,z)
#define pl(x) printf("%lld",x)
#define pll(x,y) printf("%lld %lld",x,y)
#define plll(x,y,z) printf("%lld %lld %lld",x,y,z)
#define ps(ch) printf("%s",ch)
#define F(i,a,b)      for(int i= a; i <= b; i++)
#define R(i,b,a)      for(int i= b; i >= a; i--)
#define REP(i,n) for(int i = 0; i < (n); i++)

int dx[] = {1, -1, 0, 0};
int dy[] = {0, 0, 1, -1};
int dx8[] = {0, 0, 1, 1, 1, -1, -1, -1};
int dy8[] = {1, -1, -1, 0, 1, -1, 0, 1};
int kx8[] = {1, 1, 2, 2, -1, -1, -2, -2};
int ky8[] = {2, -2, 1, -1, 2, -2, 1, -1};
/* for Random Number generate
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
*/
///**
template < typename F, typename S >ostream& operator << ( ostream& os, const pair< F, S > & p ) {return os << "(" << p.first << ", " << p.second << ")";}
template < typename T >ostream &operator << ( ostream & os, const vector< T > &v ) {os << "{"; for (auto it = v.begin(); it != v.end(); ++it) {if ( it != v.begin() ) os << ", "; os << *it;} return os << "}";}
template < typename T >ostream &operator << ( ostream & os, const set< T > &v ) {os << "["; for (auto it = v.begin(); it != v.end(); ++it) {if ( it != v.begin()) os << ", "; os << *it;} return os << "]";}
template < typename F, typename S >ostream &operator << ( ostream & os, const map< F, S > &v ) {os << "["; for (auto it = v.begin(); it != v.end(); ++it) {if ( it != v.begin() ) os << ", "; os << it -> first << " = " << it -> second ;} return os << "]";}
#define dbg(args...) do {cerr << #args << " : "; faltu(args); } while(0)
clock_t tStart = clock();
#define timeStamp dbg("Execution Time: ", (double)(clock() - tStart)/CLOCKS_PER_SEC)
void faltu () { cerr << endl; }
template <typename T>void faltu( T a[], int n ) {for (int i = 0; i < n; ++i) cerr << a[i] << ' '; cerr << endl;}
template <typename T, typename ... hello>
void faltu( T arg, const hello &... rest) { cerr << arg << ' '; faltu(rest...); }

// Program showing a policy-based data structure.
#include <ext/pb_ds/assoc_container.hpp> // Common file 
#include <ext/pb_ds/tree_policy.hpp>
#include <functional> // for less 
using namespace __gnu_pbds;

// GNU link : https://goo.gl/WVDL6g
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
        tree_order_statistics_node_update>
        new_data_set;
// find_by_order(k) – ফাংশনটি kth ordered element এর একটা পয়েন্টার রিটার্ন করে। অর্থাৎ তুমি চাইলেই kth ইন্ডেক্সে কি আছে, সেটা জেনে ফেলতে পারছো!
// order_of_key(x) – ফাংশনটি x এলিমেন্টটা কোন পজিশনে আছে সেটা বলে দেয়।
//*//**___________________________________________________**/
const int N = 1000006;
const int LN = 21;
vector<int>Q[N], g[N];
vector<ll> Cst[N], color[N];

ll col[N], cost[N];
ll ans[N];

int in[N], out[N];
int H = 0, dp[N][LN], level[N];
int n, q;

void dfs(int v, int p, int d) {
  in[v] = ++H;
  dp[v][0] = p;
  level[v] = d;
  for (int i = 1; i < LN; i++)
    dp[v][i] = dp[dp[v][i - 1]][i - 1];
  for (auto to : g[v])
    if (to != p)dfs(to, v, d + 1);
  out[v] = ++H;
}

int lca(int u, int v) {
  if (level[v] > level[u])swap(u, v);
  int dif = level[u] - level[v];
  for (int i = 0; i < LN; i++)
    if (dif & (1 << i))u = dp[u][i];
  if (u == v)return u;

  for (int i = LN - 1; i >= 0; i--) {
    if (dp[u][i] != dp[v][i]) {
      u = dp[u][i];
      v = dp[v][i];
    }
  }
  return dp[u][0];
}

map<int, int>cnt;
map<int, ll>dist;

void go(int v, int p, int curdist) {
  for (auto i : Q[v]) {
    ll Add = 1;
    if (i < 0)Add = -2;
    i = abs(i);
    ans[i] += Add * (curdist + cnt[col[i]] * cost[i] - dist[col[i]]);
  }

  for (int i = 0; i < (int)g[v].size(); i++) {
    int to = g[v][i];
    int Clr = color[v][i];
    if (to == p)continue;
    cnt[Clr]++;
    dist[Clr] += Cst[v][i];
    go(to, v, curdist + Cst[v][i]);
    cnt[Clr]--;
    dist[Clr] -= Cst[v][i];
  }
}
int main()
{
  FASTIO
  ///*
#ifndef ONLINE_JUDGE
  freopen("in.txt", "r", stdin);
  freopen("out.txt", "w", stdout);
  freopen("error.txt", "w", stderr);
#endif
//*/
  cin >> n >> q;
  //dbg(n,q);
  for (int i = 1; i < n; i++) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    // dbg(a,b,c,d);
    g[a].push_back(b);
    g[b].push_back(a);
    color[a].push_back(c);
    color[b].push_back(c);
    Cst[a].push_back(d);
    Cst[b].push_back(d);
  }

  dfs(1, 0, 0);
  int a, b;
  for (int i = 1; i <= q; i++) {
    cin >> col[i] >> cost[i] >> a >> b;
    //dbg(a,b);
    Q[a].push_back(i);
    Q[b].push_back(i);
    Q[lca(a, b)].push_back(-i);
  }
  go(1, 0, 0);
  for (int i = 1; i <= q; i++) {
    cout << ans[i] << "\n";
  }
  return 0;
}

Measured memory_bytes: 139060