x2 '9): + 20 _ x - 4 ' (a) is it possible to apply the quotient limit theorem to find the limit of this function as x -> 4? (b) is this function continuous at x = 4? Why? - (c) Find :a function which, for x 75 4, is equivalent to the given function, and obtain from'the equivalent function-the limit of y. as x > 4. 4. Given yzn f(x) =