Examine the following statements and identify the type of price discrimination in each case:
a. A popular club in a city waives its entry fees for women who arrive before 11 p.m.
b. A combo meal of a burger, a soft drink, and fries at a fast food outlet costs less than how much it would cost to buy each separately.
c. A guy selling counterfeit watches on the street states a different price to each person who wants to buy a watch.