Please answer part D, find S'(t)

Question 14, 2.3.29-SS HW Score: 73.48%, 16.17 of 22 points O Part 4 of 5 Points: 0 of 1 Save Students in a zoology class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. After t months, the average score S(t), as a percentage, was found to be given by the following equation, where t 2 0. Complete parts (a) through (e) below. S(t) =73 - 14 In (t + 1), Ost= 80 a) What was the average score when they initially took the test? The average score was 73%. (Round to one decimal place as needed.) b) What was the average score after 4 months? The average score after 4 months was 50.5 %. (Round to one decimal place as needed.) c) What was the average score after 24 months? The average score after 24 months was 27.9%. (Round to one decimal place as needed.) d) Find S' (t). S' (t) =