Can some please help with this question

(a) Teddy] is a manufacturer of dish washing liquid. If his monthly demand function for 7'50ml size is q = 4000 250p and his total cost function is C(q) = 500 + 0.2q. (i) Derive an expression, R(q) for Teddy J's total revenue curve. (ii) Derive an expression, 11(q) for Teddy J's prot function. (iii) Determine whether Teddy l's prot is increasing or decreasing when he produces 5 hundred, TSOml bottles ofdish washing liquid. (iv) How many 750ml bottles of dish washing liquid should Teddy] produce per month if he wishes to maximize his profits. (1:) A rm has an average cost function where q is the rm's output. (i) Determine the level of output for average costs are minimum. (ii) Hence determine the range ofvalues for which average costs are decreasing. (iii) What part of the decreasing range is practically feasible? (iv) Write an equation for the total cost function. (v) Hence calculate the level ofoutput for which total costs are minimum