A fair coin is flipped twice. Drag letters to complete the tree diagram to represent the sample space

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.

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?