4. Consider the function 2x if x = (0,2] f(x) = X if x (2,4) 2 You must explain your reasoning for all parts. (i) What is range of ? (ii) What is fo (3)? (iii) Find all x such that f(x) = 2. It not enough to just find the cor- rect solution(s), it must be clear that you have found all possible solutions. (iv) Does an inverse function of exist?