A pizzeria is introducing a new type of pizza. In order to assess the customers' willingness to pay (WTP) for the new pizza type, the shop randomly selects 100 clients and offers them a choice between a $3 voucher and a slice of the new pizza. 25 customers select the pizza slice, and 75 say that they are indifferent between the voucher and the pizza slice. What is the average WTP of these 100 customers for a slice of the new pizza? O Less than $3 O $3 O More than $3 The shop does not have enough information to determine whether average WTP is more or less than $3