Analyze the demand function for a dinner in the restaurant Delicious Food, given the four changes listed below:

a) The restaurant down the street, Fancy Meals, features a two for one meal special.

b) The opera provides a coupon for a 15% discount at Delicious Food for a meal with a 6:00pm reservation on opera evenings.

c) Bob’s Discounted Tires runs a special on tires; a 30 percent reduction in price if you buy four tires.

d) The main employer in town provides a 5% increase in salaries for white-collar workers.