MOD = 10 ** 9 + 7

def matpow(A, B, w):
    l = len(A)
    while w:
        if w & 1:
            C = [0] * l
            for i in range(l):
                for j in range(l):
                    C[i] += A[i][j] * B[j]
                    C[i] %= MOD
            B = C
        C = [[0] * l for _ in range(l)]
        for i in range(l):
            for j in range(l):
                for k in range(l):
                    C[i][j] += A[i][k] * A[k][j]
                    C[i][j] %= MOD
        A = C
        w >>= 1
    return B

n, m, k, p, q = map(int, input().split())
B = [0, 0]
for _ in range(m):
    B[0] += int(input())
    B[0] %= MOD
for _ in range(n - m):
    B[1] += int(input())
    B[1] %= MOD
A = [[0, 0], [0, 0]]
A[0][1] = A[1][0] = p * pow(q, MOD - 2, MOD) % MOD
A[0][0] = A[1][1] = (1 - A[0][1]) % MOD
print(matpow(A, B, k)[0])