Mark immediately started the conversation by saying. "Customers are going to love that their ride time will be cut in half by the new lift.

But there must be a mistake in Doug's data. If the new lift doubles the speed at which skiers travel up the mountain, then it must be that it can unload more skiers at the top at a faster rate! Shodn't the unloading capacity double?" Doug responded, "I think the table is correct because from what I have observed, people are not able to load onto a detachable lift any faster than on a fixed$-$grip lift." Jessica jumped in$,$ "Doug, assuming you are right, and I am not sure you are, does that mean the only difference between a fixed$-$grip and a detachable lift is that one moves faster than the other?"

QUESTIONS

$1.$ Who do you think is correct, Mark $($the unload capacity should be twice as high$)$ or Doug $($the two lifts have the same capacity$)?$

$2.$ Can you give a response to Jessica$-$is there any other difference between the two lifts?