Sunland's PPF are :
Food( lbs per month)
300
200
100
0
Sunscreen(gallons per month)
0
50
100
150
To get a gallonof sunscreen the people of Sunland are willingto give up 5 lbs of food if they have 25 galons of sunscreen, 2 lbsof food if they have 75 gallons of sunscreen, and 1 lb of food ifthey have 125 gallons of suncreen.
a)Draw a graph of Sunland's marginal benefit from sunscreen
b)What is the efficient quantity of sunscreen?