Assume the following for a rare and valuable resource, Lithium. 1. The socially optimal quantity for…

Assume the following for a rare and valuable resource,
Lithium.
1. The socially optimal quantity for every period is 42
tons.
2. There exist, in total, 150 tons of lithium in reserve.
3. There are 2-periods we like to consider in the allocation of
this resource.
Please answer the following questions in a clear and concise
fashion:
1. What is the socially efficient quantity for the 2
periods?
2. At the socially efficient quantity, did the 1st period incur
any User Cost?
if yes, provide the amount. If no, explain why there is no user
cost.