import sys, itertools
md = 1000000007
h = (md+1)//2
n, m, k, p, q = map(int, input().split())
bi = sum(map(int, itertools.islice(sys.stdin, m)))
bo = sum(map(int, sys.stdin))
print(((bi+bo)+(bi-bo)*pow(1-2*p*pow(q, -1, md), k, md))*h%md)