4. Consider the piecewise-defined function f (x) = Jx + 3, 1-x, x > 0. (a) Graph f(x) on the coordinate plane given below. Remember f(x) is a FUNCTION, so it must pass the vertical line test! (Erase if you need to...) 3 2 T -4 -3 -2 2 3 4 -1 -2 -3 (b) f(0) = (c) lim f(x) = C+0