Determine whether or not it is reasonable to assume that ???????? ≈ ???????? when

(a) ???????? = 22, ???????? = 20, ???????? = 15.4, and ???????? = 20.8.

(b) ???????? = 60, ???????? = 80, ???????? = 103.5, and ???????? = 40.7.

(c) ???????? = 102, ???????? = 98, ???????? = 23.1, and ???????? = 30.2.