13. SELECT FName,LName FROM DANCES

WHERE Dance='Bachata' AND Dance='Salsa'

query returns which one of the following

a) First and Last names of People who can dance "Bachata".

b) First and Last names of People who can dance "Salsa".

c) First and Last names of People who can dance "Bachata" or "Salsa".

d) First and Last names of People who can dance "Bachata" and "Salsa".

e) First and Last names of People who can dance "Bachata", but can not dance "Salsa".

f) First and Last names of People who can dance "Salsa", but can not dance "Bachata".

g) none of the above.

14. SELECT FName,LName FROM DANCES WHERE Dance='Bachata'

INTERSECT

SELECT FName,LName FROM DANCES WHERE Dance='Salsa'

query returns which one of the following

a) First and Last names of People who can dance "Bachata".

b) First and Last names of People who can dance "Salsa".

c) First and Last names of People who can dance "Bachata" or "Salsa".

d) First and Last names of People who can dance "Bachata" and "Salsa".

e) First and Last names of People who can dance "Bachata", but can not dance "Salsa".

f) First and Last names of People who can dance "Salsa", but can not dance "Bachata".

g) none of the above.

15. SELECT FName,LName FROM DANCES WHERE Dance='Bachata'

UNION

SELECT FName,LName FROM DANCES WHERE Dance='Salsa'

query returns which one of the following

a) First and Last names of People who can dance "Bachata".

b) First and Last names of People who can dance "Salsa".

c) First and Last names of People who can dance "Bachata" or "Salsa".

d) First and Last names of People who can dance "Bachata" and "Salsa".

e) First and Last names of People who can dance "Bachata", but can not dance "Salsa".

f) First and Last names of People who can dance "Salsa", but can not dance "Bachata".

g) none of the above.