56. Business When the price of an essential commodity (such as gasoline) rises rapidly, consumption drops slowly at first. If the price continues to rise, however, a "tipping" point may be reached at which consumption takes a sud- den, substantial drop. Suppose the accompanying graph shows the consumption of gasoline, G(t), in millions of gallons, in a certain area. We assume that the price is rising rapidly. Here, t is time in months after the price began ris- ing. Use the graph to find the given quantities. (a) lim G(t) (b) lim G(t) (c) G(16) 1- 12 1- 16 (d) The tipping point (in months) G(t) 4 3.5 (12, 3) (16, 2) + (16, 1.5) a in 4 8 12 16 20 24