Calculate the numerical value of cross-price elasticity, exy, in each of the following situations. Do not round your interim calculations before obtaining the final solution (i.e. do not clear your calculator). In each case, express the number to two decimal places and include a negative sign where appropriate (i.e. -1.67, not -1.7 or 1.667) but leave positive values without a plus sign (i.e. 1.67, not +1.67). Identify whether the two products in italics are substitute or complementary products. a. The price Consumer X pays each month for access to the Internet decreases from $80 to $40, causing the quantity demanded of e-magazines she reads on her computer to rise from 3 to 5. The numerical value of cross-price elasticity is The Internet and e-magazines are (Click to select) products. b. The quantity demanded of do-it-yourself hair-cutting sets increases from 5,000 to 10,000 when the average price of a hairstylist's cut rises from $40 to $60 per hour. The numerical value of cross-price elasticity is products. Do-it-yourself hair-cutting sets and hairstylist's cuts are (Click to select) c. A fall in the average price of smartphones from $600 to $400 increases purchases of smartphone apps from 1 million to 3 million per month. The numerical value of cross-price elasticity is Smartphones and smartphone apps are [(Click to select) products.