It is a hot day and Bert is thirsty. Here is the value he places on each successive bottles of water.

1st bottle	$7
2nd bottle	$5
3rd bottle	$3
4th bottle	$1

(a) If the market price of water is $3, how many bottles will Bert buy?

(b) What is the consumer surplus on all the bottles Bert buys?

Show your work/explain your answer for both parts (a) and (b).