Solve the below problem:
Q: Suppose a firm produces two goods and has the cost function, TC = 15Q_1 + 15Q_2 (the quantities of the two goods are given by Q_1 and Q_2).
Does the firm possess economies of scale in the production of good 1?
What is the average incremental cost for good 1 when Q_1 = 10 and Q_2 = 10?
Does the firm possess economies of scope?