Logan, a BSI summer intern, has been assigned to handle a new project that the firm has received. This project involves a lot of scheduling that has to be handled by Logan. Logan estimates that the first task of the project could be completed in as few as $16$ days or could take as many as $24$ days, but most likely will require $20$ days. What is the $20-$day estimate called and how much time should Logan actually assign to the task?

Group of answer choices

probable$-$case estimate $($P$)$; $22$ days

worst$-$case estimate $($W$)$; $24$ days

best$-$case estimate $($B$)$; $16$ days

None of these are correct

probable$-$case estimate $($P$)$; $20$ days