using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	static List<Tuple<int,int,int>>[] li;
	static List<Tuple<int,int>>[] li2;
	static bool[] b;
	static int[][] h,z;
	static int[] de,di,c1,c2,ans;
	static int o;
	static void Main(){
		Sc sc=new Sc();
		int[] s=sc.Ia;
		int n=s[0],m=n-1;
		li=new List<Tuple<int,int,int>>[n+1];
		li2=new List<Tuple<int,int>>[n+1];
		b=new bool[n+1];
		o=(int)Log(n,2)+1;
		de=new int[n+1];
		di=new int[n+1];
		c1=new int[n+1];
		c2=new int[n+1];
		ans=new int[s[1]];
		de[0]=-1;
		h=new int[o][];
		z=new int[s[1]][];
		h[0]=new int[n+1];
		for(int i=1;i<=n;i++){
			li[i]=new List<Tuple<int,int,int>>();
			li2[i]=new List<Tuple<int,int>>();
		}
		for(int i=0;i<m;i++){
			int[] e=sc.Ia;
			li[e[0]].Add(Tuple.Create(e[1],e[2],e[3]));
			li[e[1]].Add(Tuple.Create(e[0],e[2],e[3]));
		}
		Fu(1,0,0);
		for(int i=1;i<o;i++){
			h[i]=new int[n+1];
			for(int j=1;j<=n;j++){h[i][j]=h[i-1][h[i-1][j]];}
		}
		for(int i = 0;i<s[1];i++) {
			z[i]=sc.Ia;
			int d=Lca(z[i][2],z[i][3]);
			ans[i]=di[z[i][2]]+di[z[i][3]]-di[d]*2;
			li2[z[i][2]].Add(Tuple.Create(i,1));
			li2[z[i][3]].Add(Tuple.Create(i,1));
			li2[d].Add(Tuple.Create(i,-2));
		}
		b=new bool[n+1];
		Fu2(1);
		Console.WriteLine(String.Join("\n",ans));
	}
	static void Fu2(int a){
		b[a]=true;
		for(int i=0;i<li2[a].Count;i++){
			ans[li2[a][i].Item1]+=c1[z[li2[a][i].Item1][0]]*z[li2[a][i].Item1][1]*li2[a][i].Item2;
			ans[li2[a][i].Item1]-=c2[z[li2[a][i].Item1][0]]*li2[a][i].Item2;
		}
		for(int i=0;i<li[a].Count;i++){
			if(!b[li[a][i].Item1]){
				c1[li[a][i].Item2]++;
				c2[li[a][i].Item2]+=li[a][i].Item3;
				Fu2(li[a][i].Item1);
				c1[li[a][i].Item2]--;
				c2[li[a][i].Item2]-=li[a][i].Item3;
			}
		}
	}
	static void Fu(int a,int f,int p){
		b[a]=true;
		de[a]=f;
		di[a]=p;
		for(int i=0;i<li[a].Count;i++){
			if(!b[li[a][i].Item1]){
				h[0][li[a][i].Item1]=a;
				Fu(li[a][i].Item1,f+1,p+li[a][i].Item3);
			}
		}
	}
	static int Lca(int a,int b){
		if(de[a]>de[b]){int c=a;a=b;b=c;}
		for(int i=o-1;de[a]!=de[b];i--){if(de[h[i][b]]>=de[a]){b=h[i][b];}}
		if(a==b){return a;}
		for(int i=o-1;i>=0;i--){if(h[i][a]!=h[i][b]){a=h[i][a];b=h[i][b];}}
		return h[0][a];
	}
}

public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}
	public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}
	public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}


Measured memory_bytes: 84980