2 parts(located in picture, its ok if you olny do one of them just tell me.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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?