Help for brianlies nad 5 stars with many points

What is coefficient of the term of degree of degree 5 in the polynomial below

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

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?