please provide explanation on question below

DHaganBookscoIn has been experiencing a run of bad luck with its summer college intern program in association with Party Central University (begun as_a_r_s_l._1_l_t__o_t_' a suggestion by Marjory Duin over dinner one evening). The frequent errors in lling orders, charges from movie download sites and dating sites, and beverages spilled on computer equipment have resulted in an estimated weekly C(x}= 25 x2 5.2 cost to the company of 'H 4000 dollars where mthe number of college interns emplo yed . a) What is the marginal cost at a level of 10 interns? I b) What is the average cost per intern at a level of 10 interns? c) What is the marginal average cost at a level of 10 interns? d) Interpret the results of parts (ch)