Leslie works for Blank Chemical Corporation. Her annual salary is $57,285.50. She is paid biweekly (26 weeks). Each pay period, Leslie's employer deducts $418.63 for
federal tax withholding. City tax for Blank Chemical employees is 3.65%. What is Leslie’s annual social security (6.2%) deduction?

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?