Please help me solve for B and C. Answer is given but I am struggling to solve both these problems.

You've just completed a pilot run of 10 units of a major product and found the processing time for each unit as follows % Change 65.979% 59.375% 59.524% 54.474% 59.375% a) What is the learning curve rate, based on this information? 59.745% b) Using the learning curve rate in (a), estimate the length of time the clerk will take to complete the first 190 units. 11,310.59 c) How long (total amount of time) will it take to complete the 1000th unit? 5.721