A garden shop sells hoses and shovels and keeps some of the products on display and the rest in storage. There are10hoses and6shovels on display. There are20hoses and15shovels in storage. If the columns represent each type of product, hoses and shovels, and the rows represent each location, display and storage, which matrix could be used to organize this data correctly?

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?