Use the sets below to answer the questions that follow:
{8, 2, 4}
{ x | x is the last letter of car, cart, or carry}
{ x | x î n and ($y)(y î {1, 2, 3} and x = 2y) }
{y, t, r}
{}
{2, 4, 8}
{ x | x is the last letter of car, cart, and carry}
{4, t, y, 8, r, 2}
a) how many different sets are described here?
.b) what are the unique sets? list each set and name it, i. e. to list set {1,2,3} and name it a, then write a = {1, 2, 3} .
3.c) for the sets you named in the previous question, show all subset and proper subset relationships that exist between them.
3.d) for the largest set ls in the previous question, how many sets would be in ã(ls)?