Three friends, A, B, and C, start a business with investments in the ratio of 2 : 3 : 1, respectively. A invested $9130, and all three of them agree to share profits in the ratio of their investments.

a. Calculate C's investment.

b. If A's profit was $45,000 in the first year, calculate B's and C's profits.

c. In the second year, their total profit was $180,000. How much would each of them receive from this total profit?