It is estimated that 75%of a grapefruit crop is good; the other 25%have rotten centers that cannot be detected unless the grapefruit are cut open. The grapefruit are sold in sacks of 8. Let r be the number of good grapefruit in a sack. a) What is the probability of getting no more than one bad grapefruit in a sack? (Round your answer to three decimal places.) _______________________. b) What is the expected number of good grapefruit in a sack? (Round your answer to one decimal place.) _______________________ grapefruit c) What is the standard deviation of the r probability distribution? (Round your answer to two decimal places.) _______________________ grapefruit