For the given learning$$ rate, learning curve coefficient for th unit$=$

$$

$0\mathrm{.}214$

Part $4$

th exam

$$

$4\mathrm{.}28$ minutes

$($response should be rounded to the nearest $2$nd decimal$$ place$)$

Part $5$

For the given learning$$ rate, the cumulative learning curve coefficient for $10$th unit$=$

$$

$4\mathrm{.}929$

Part $6$

grade the first $10$ exams

$$

$21\mathrm{.}1$ minutes

$($response should be rounded to the nearest $2$nd decimal$$ place$)$