import sys
input = sys.stdin.readline
N,M,K,P,Q = map(int,input().split())
MOD = 10**9+7
x = sum([int(input()) for i in range(M)])
y = sum([int(input()) for i in range(N-M)])

invQ = pow(Q,-1,MOD)
p = P * invQ
a = (y-x)*p
r = (Q-2*P) * invQ
ans = a*(1 - pow(r,K,MOD)) * pow((1-r),-1,MOD)
ans += x
ans %= MOD
print(ans)