John's demand curve for cues (Q) is given by D(p) = 90 - 3p, where p is the unit price of cues. a) How much is John'sgross consumer surplusfrom consuming60 unitsof cues? b) How much is John'snet consumer's surplusfrom consuming60 unitsof cues? c) If thepriceof cueschanges from 10 to 20, how much is thechange inJohn'snet consumer surplus? d) How much is theprice elasticityof John's demand for cuesat a price of 20? e) What price willmaximizeJohn'sexpenditureon cues