If Professor Laurie Macdonald takes minutes to grade the first exam and follows an $\%$ learning curve$$ then, using table Table E$\mathrm{.}3$LOADING...$,$ the amount of time she requires to$$ grade:

Part $2$

$$a$)$ the th exam

$$

$4\mathrm{.}26$ minutes

$($round your response to two decimal$$ places$).$

Part $3$

$$b$)$ the first $10$ exams

$$

enter your response here minutes

$($round your response to two decimal$$ places$).$