Suppose that Alice's RSA parameters are those given in Exercise 1 and that Bob's RSA modulus is m_B = 187. If Bob's public exponent is e_B = 13 and Alice wants to encrypt the message-signature pair (x, sigma) = (70, 21), calculate her encrypted pair. If Bob's private exponent is d_B = 37 and he receives the enciphered message-signature pair (11, 69), what are the original plaintext and signature Is this a valid message-signature pair