Determine f(z) and h(z) such that r(x) = f o g o h, given that r(x) = 2. (Two correct answers)
a) f(z) = z + 3, h(z) = z - 1
b) f(z) = 2z, h(z) = z + 1
c) f(z) = z - 1, h(z) = z + 3
d) f(z) = z + 1, h(z) = 2z