can you help me solve these questions?

6. Assume that Q = K L. Show that OK = a and OL = b where OK = rK/pQ and OL = WL/PQ. 7. Assume that Q = KaLl-a. Derive the function k (w) .where k = K/L, and w = w/r . 8. Assume that Q = KaLl-a. Derive the minimum-unit-cost function, c (r, w). 9. From the minimum-unit-cost function you derived in the above problem, recover the production function