2. Consider the cubic function f (x) = ax + bx" + 3x +4. Find the values of a and b in each of the following cases (a) /(x) is divisible by (x-1) and leaves a remainder 6 when divided by (x+1). (b) / (x) is divisible by (x - 1). (c) f(x) leaves a remainder -3x +3 when divided by (X - 1)