Examine the following formal descriptions of sets so that you understand which
members they contain. Write a short informal English description of each set.
a. {1, 3, 5, 7, . . . }
b. { . . . ,−4,−2, 0, 2, 4, . . . }
c. {n| n = 2m for some m in N}
d. {n| n = 2m for some m in N, and n = 3k for some k in N}
e. {w| w is a string of 0s and 1s and w equals the reverse of w}
f. {n| n is an integer and n = n + 1}