Average Profit: The estimate revenue and cost functions for the development of a new product are given by R(x)= -2x^2 + 8x and C(x)= 3x + 2, where x is the number of items in thousands.
a) Determine the break-even point for production.
b) The average profit function is AP(x)= P(x)/x. What production levels are required for AP(x) > 0?