1. Write the following in roster form, (a) A = {x – 2 = 5}
(b) B = {x2 – X – 2 = 0}
(c) C = {x 1x = 4m, m E N and m <3}
2. Write the following in set builder notation,
(a) Let A consist of the letters a, b, c, d and e
(b) Let B = {4}
(c) C = {-V2.2
(d) D = {10,15,20,25,30}
3. Which of these sets is the null or singleton se
(a) A={x] x is a letter before a in the alphal
(b) B ={ x| x2 = 9 and 2x = 4}
(c) C ={x| x + x)
(D = x​