3.17.Ikea provided delivery and installment services. The average delivery distance was 86 miles and the standard deviation was 12 miles. a. The delivery fee was based on distance for $4.25 per mile. (The longer distance cost more delivery fee). The price should average dollars with standard deviation dollars. b. Suppose that customers may choose to pay $20 gas fee to lower the delivery fee $2.75 per mile. Therefore, for each mile, they pay a net fee of (Distance)($2.75)+$20. the net fee per mile should average dollars with a standard deviation of dollars.