Please answer Q7, a,b,c and d

7. The owners of ABC Electronics are interested in analyzing the productivity of their staff. The function N(t) = 150- 600 models the total number of customers, N , served by the staff V16+ 3t? after t hours during an 8-h workday (Ost 58) . Where appropriate, round answers to the nearest whole number. (12 marks) a) Determine N'(t). What does the derivative represent for this situation? b) Determine N(4) and N'(4). Interpret the meaning of each of these values for this situation. c) Solve N(t) =103. Interpret the meaning of your answer for this situation. d) Determine N'(t) for the value you found in part c). Compare this value with N'(4) . What conclusion, if any, can be made from comparing these two values