Astudy discovered that Americans consumed an average of 12.? pounds of chocolate per year. Assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.5 pounds. Complete parts a through e below. a. What is the probability that an American will consume less than 9 pounds of chocolate next year? 0.1520' {Round to four decimal places as needed.) b. What is the probability that an American will consume more than 11 pounds of chocolate next year'? [1.13816'l {Round to four decimal places as needed.) c. What is the probability that an American will consume between 10 and 13 pounds oi chocolate next year? [1.3056 {Round to four decimal places as needed} d. What is the probability that an American will consume exactly 12 pounds of chocolate next year'? 0.5?53 {Round to tour decimal places as needed.)