Suppose that Bob has budgeted $20 a month to buy candy bars, music downloads, or some combination of each. If Bob buys only candy bars, he can obtain 40 bars a month; if he buys only downloads, he can buy 20 a month. 1. What is the price of a candy bat? 2. What is the price of a music download? 3. What is the opportunity cost of a music download? 4. What is the opportunity cost of a candy bar? 5. Would the opportunity cost of each good change if Bob decided to increase his monthly budget to $30 for the two items