Susan can brew 5 gallons of root beer in an hour or she can make 4 pizzas in an hour. Becky can brew 7 gallons of root beer in an hour or she can make 5 pizzas in an hour. Susan's opportunity cost of making a pizza is 4 gallons of root beer. Becky's opportunity cost of making a pizza is 7 gallons of root beer.

Requried:
Who has an absolute advantage in making pizza?