Question 5 (3 points) For each of the below production functions, find the minimum cost of producing 2 units of output when input prices are w1 = 2 and w2 = 6. Wherever rounding is needed, please round to 3 decimal points. (a) (1.5 points) f(Z1, Z2) = [min { z1, 3z2}12 (b) (1.5 points) f(Z1, Z2) = 21 + Z2" 70.5