Find the range of these functions.

a) f(x)=x − 2, x ≤ 3

b) g(x) = 2x², −3 ≤ x ≤ 1

c) h(x) = x³ + 4, x > −2

d) f(x) = 1/x, x ≥ 1

e) g(x) = 7x + 1, −1 ≤ x ≤ 3

f) h(x) = x⁴, x ∈ R