Show transcribed image text 10 pts) Find (x. y) points on the graph at which the tangent line is horizontal. Also graph the function and label the computed points. 4. Items cost $2.50 each to produce and sell for $15 each. The overhead is $1,000. a) (5 pts) Find the cost, revenue and profit functions. b) (5 pts) Find the (x, y) coordinates of the breakeven point and find the number of units x required to make a profit of $2,000.