1. Find all pizzas eaten by at least one female over the age of 20.
	   
	\project_{pizza}(
		
		(\project_{name}	// nombre de todas las female
			\select_{gender='female' and age > 20}
				Person
		)
		
	\join Eats
			
			
	)
			
2.Find the names of all females who eat at least one pizza served by Straw Hat.
			(Note: The pizza need not be eaten at Straw Hat.) 

					

	\project_{name}(
	
		(\project_{name}	// nombre de todas las female
			\select_{gender='female'}
				Person
		)
		\join 
			(
				( Eats) 
				 \join 
				( \select_{pizzeria='Straw Hat'} Serves)
			)
	)
				
				
3. Find all pizzerias that serve at least one pizza for less than $10
	that either Amy or Fay (or both) eat.				

				
	\project_{pizzeria} (
		( \select_{price < 10}  Serves )
			\join
		( \select_{name='Amy' or 'Fay'} Eats )
	)