Answer and show steps

A waitress believes the distribution of her tips has a model that is slightly skewed to the left, with a mean of $9.20 and a standard deviation of $6.40. She usually waits on about 50 parties over a weekend of work. a) Estimate the probability that she will earn at least $600. b) How much does she earn on the best 10% of such weekends? . . .. . a) P(tips from 50 parties > $600) = (Round to four decimal places as needed.) b) The total amount that she earns on the best 10% of such weekends is at least $ (Round to two decimal places as needed.)