Please show all work I will not be graded on this

Question 3 (20 points). Consider a firm with the following production function y = \\ min{5x1, 50x2} For the whole exercise let the price of input 1 be $10 and the price of input 2 be $50. a) Show that the production function has decreasing returns to scale. (4 points) b) Obtain the cost function. (6 points) Plot in the same graph the marginal cost and the average cost (4 points) Solve the profit maximization problem and calculate the profits of the firm when the output price is $12. (Hint: it might be a good idea to use the cost function you obtained before) (6 points)