a) Find the set of solutions of each of the linear congruence: i. 8x = 12 (mod 28). ii. 7x = 1 (mod 9). b) Hashing Function is used to assign a memory location for the records in the computer (For example to assign a memory location for the student ID number). The function used to assign locations is given by: h(k) = k mod m When m = 50 memory locations, find the location assigned to the following number: 64212848 37149212 107405723