// Coded by Durgesh Tiwari
 
#include<bits/stdc++.h>
 
using namespace std;
int main(void)
{
    int t;
    cin >> t;
    int n,r;
        int m[100],R[100],x1[100],y1[100],x2[100],y2[100];
        int z[100],a[100],b[100],c[100],f[100];
        int h=0;
        int temp=0;
        int e=0;
        int v=0;
    while(t--)
    {
 
       cin >> n >> r;
       for(int i=0;i<n;i++)
       {
 
           cin >>R[i]; 
           z[i]=i+1;
       }
 
       for(int i=0;i<n;i++)
       { 
           if(i+1==n)
             break;
            else 
            e=z[i+1]-z[i];
            if(e==0)
            {
                f[i]=0;
            }
            else
            {
            f[i]=(R[i+1]-R[i])/e;
            }
       }
 
       for(int i=0;i<r;i++)
       {
           cin >> x1[i] >>  x2[i] >>  y1[i] >> y2[i]; 
           v=(x2[i]-x1[i]);
           if(v==0)
           {
               m[i]=0;
           }
           else
           {
           m[i]=(y2[i]-y1[i])/(x2[i]-x1[i]);
           }   
       }
       for(int i=0;i<r;i++)
       {
            temp=m[i];
           for(int j=0;j<n;j++)
           {
               if((temp==f[j])&&(j<n-1))
               {
                   h=h+1;
               }
           }
 
           cout << h << "\n";
           h=0;
       }
 
    }
  return 0;
}
 

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