import sys

input = sys.stdin.readline

N,M = map(int,input().split())
A = [0,0] + list(map(int,input().split()))

def divisors(M):#Mの約数列 O(n^(0.5+e))
    import math
    d=[]
    i=1
    while math.sqrt(M)>=i:
        if M%i==0:
            d.append(i)
            if i**2!=M:
                d.append(M//i)
        i=i+1
    d.sort()
    return d

div = divisors(N)
n = len(div)
res = 0
mod = 10**9+7
z = N
for i in range(n):
    for j in range(i):
        y,x = div[i],div[j]
        if y%x==0 and x!=1 and y!=N:
            inv = (A[x]-A[y])*(A[y]-A[z])*(A[z]-A[x])
            tmp = (A[z]-A[x]) * (pow(A[z]-1,M-1,mod) - pow(A[y]-1,M-1,mod))
            tmp %= mod
            tmp += (A[y]-A[z]) * (pow(A[z]-1,M-1,mod) - pow(A[x]-1,M-1,mod))
            tmp %= mod
            tmp = (tmp * pow(inv,mod-2,mod)) % mod
            res += tmp

def calc(x,y,z=N):
    inv = (A[x]-A[y])*(A[y]-A[z])*(A[z]-A[x])
    tmp = (A[z]-A[x]) * (pow(A[z]-1,M-1,mod) - pow(A[y]-1,M-1,mod))
    tmp %= mod
    tmp += (A[y]-A[z]) * (pow(A[z]-1,M-1,mod) - pow(A[x]-1,M-1,mod))
    tmp %= mod
    tmp = (tmp * pow(inv,mod-2,mod)) % mod
    return tmp

print(res)

N_ok = [False for i in range(N+1)]
for d in div:
    N_ok[d] = True

lazy = [[] for i in range(N+1)]
for _ in range(int(input())):
    x,y = map(int,input().split())
    if y!=N:
        if N_ok[y]:
            res += calc(x,y)
            res %= mod
        else:
            lazy[y].append(x)
    else:
        y = x
        N_ok[y] = True
        for x in lazy[y]:
            res += calc(x,y)
            res %= mod
        lazy[y] = []
    print(res)