(3 pts each) Use the intermediate value theorem to show that the following functions have a root and give an interval for which a root lies. The functions are graphed at the bottom of the page. (a) f (c) = Vx + x - 1 (b) g (r) = 2 - 5 (c) h (x) = x 1 + x - 3 -3 -2 -1 h(x) # 1/ 2 g (x)