def main():
    import sys
    input = sys.stdin.buffer.readline

    mod = 1000000007

    def matmul(A, B):
        C = [[0] * len(B[0]) for _ in range(len(A))]
        for i in range(len(A)):
            for j in range(len(B[0])):
                for k in range(len(B)):
                    C[i][j] = (C[i][j] + A[i][k] * B[k][j]) % mod
        return C

    def matpow(A, p):
        n = len(A)
        B = [[0] * n for _ in range(n)]
        for i in range(n):
            B[i][i] = 1
        while p > 0:
            if p & 1:
                B = matmul(B, A)
            A = matmul(A, A)
            p >>= 1
        return B

    N, M, K, p, q = map(int, input().split())
    B = [0] * N
    for i in range(N):
        B[i] = int(input())

    P = (p * pow(q, mod-2, mod))%mod
    A = [[1-P, P], [P, 1-P]]
    KM_k = matmul(matpow(A, K), [[1], [0]])
    KM_m = matmul(matpow(A, K), [[0], [1]])

    ans = 0
    for i in range(N):
        if i <= M-1:
            ans = (ans + (KM_m[1][0] * B[i])%mod)%mod
        else:
            ans = (ans + (KM_k[1][0] * B[i])%mod)%mod

    print(ans)


if __name__ == '__main__':
    main()