Mario and Sam are the only two consumers in the market for Pineapples.Mario demand function is given by Q = 30 - 10P while Sam's demand function is given by Q = 30 - 5P . Which of the following functions describes the total market demand curve when P is between 3 and 4:

A.) Q =60-15P

B.) P = 6 - 0.2Q

C.) Q =90-50P²

D.) P = 1/60-1/15Q

The market for banana has a vertical supply curve at 100 banana and a linear, downward-sloping demand curve. The current market price for banana is $2 and all the bananas are sold at this price. Suppose the government imposes supplier a 50 cents tax on each banana sold. What's the total deadweightloss caused by this tax?

1. $0
2. $50
3. $150
4. $200