The area of rhombus is 119cm²and it's perimeter is 56 cm .find its altitude

Can someone me and do the problem plz so i can understand it more better

Me n o w. i need t h i s. 10 points

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?