Answer and Explanation:
The computation of the producer surplus and the consumer surplus is shown below:
The consumer surplus for Jeff is
= Willing to pay - current price
= $7.25 - $5
= $2.25
The consumer surplus for samir is
= Willing to pay - current price
= $8 - $5
= $3
So, the total consumer surplus is
= $2.25 + $3
= $5.25
Now the producer surplus for one producer
= Market price - willing to sell
= $5 - $4
= $1
The producer surplus for another producer
Market price - willing to sell
= $5 - $4.15
= $0.85
So, the total producer surplus is
= $1 + $0.85
=$1.85