Question attached. Help please!

7. Writing Profits Practice - in each of the following situations, write an expression for profits. a. The case where market price is equal to $30 and the cost function is c(q) = 5 + 3q2. b. The case where market price is equal to $130 and the cost function is c(q) = 5 + 10q + 3q2. c. The case where market price is left general, equal to the constant, P, and the cost function is c(q) = q + (#)q". Note that here when you find the optimal quantity, it will be a function of P