a. Consider the following hash function. Messages are in the form of a sequence of decimal numbers, M = (ay, a 2, ..., 24). The hash value h is calculated as: (Et-12) mod n, for some predefined value n. Does this hash function satisfy the basic properties of a secure hash function? Explain your answer. b. Repeat part (a) for the hash function: h' = (-1 a?) mod n C. Calculate the hash function of part (b) for M = (189,632,900,722,349) and n = 989