4) Let y = x sin(x) Calculate dy dx 5) Let f and g be continuous and differentiable functions of x everywhere. If the quotient of f and g is a constant for all x H95) .___... = k 906) How are the following related? '90:) d x) and f(x) d if] Note: This can also be written 06) x) and f (X) gtx) or simply 3')\" and fa\