Please only answer if you know it for a fact , please answer part a and b, part b is to grade the first 10 exams (10. Q3 Part A)

only answer for part A

If Professor Laurie Macdonald takes 18 minutes to grade the first exam and follows an 85% learning curve then, using table a) the 25th exam minutes (round your response to two decimal places). the amount of time she requires to grade: Learning Curve Coefficients