8 The supply function q, = f(p) for a product is quadratic. Three points which lie on the supply function are (60, 2,750), (70, 6,000), and (80, 9,750). (a) Determine the equation for the function. (b) Make any observations you can about the restricted domain of the function. (c) Compute and interpret the p intercept. (d) What quantity will be supplied at a price of $75?