occurs . . . (see text below the graph) ... For the next 3 questions, pick the graph from below which best illustrates the effect on the market for personal computers, when the following event The darker line represents a shift in the curve caused by the event. S P S P Y S S d O A B 0 C D The price of tablets, a substitute for personal computers, falls. O a. a Ob.b O c.C OddThe cost of silicon chips, a key input into the production of personal computers, rises. O a. a O b. b Occ O d.dThe economy experiences a period of rapidly rising incomes. Assume that personal computers are a normal good, not an inferior good. O a. a O b. b OCC O d. d