20. In a random sample of used cars sold in Los Angeles, the mean selling price was $10,178 with a standard deviation of $3074. a. If you do not know the shape of the distribution of selling prices, what can be said about the percentage of used cars in Los Angeles that sell for between $4030 and $16,325? b. If it is known that the selling price of used cars in Los Angeles is bell-shaped, 68% of all used cars in Los Angeles will have a selling price between what two values