Set x is made up of the possible ways five students, represented by a, b, c, d, and e, can be formed into groups of three. set y is made up of the possible ways five students can be formed into groups of three if student a must be in all possible groups. which statements about the situation are true? check all that apply.
a) set x has 10 possible groupings.
b) x y set y = {abc, abd, abe, acd, ace, ade}
c) if person e must be in each group, then there can be only one group.
d) there are three ways to form a group if persons a and c must be in it.