Two functions f and g are defined on the set of real numbers, ℝ, by f: x →

(x
)/2− x

, x ≠ 2 and g: x → px + q, where p and q are constants.

i. Find g−1

, the inverse of g

ii. Given that g
−1

(4) = 2 and g o f(4) = −8, find the values of p and q​