Problem 1: Given the superincreasing tuple b=[7, 11, 23, 43, 87, 173, 357], r=41, and the modulus n=1001. If a permutation table [76 51234] is also given, please use the knapsack cryptosystem to (1-1). Encrypt the plaintext a, by including each step: (1-2). Decrypt above cipher text of the plaintext a, by including each step.