Size of ball weight (grams) 1 150 2 280 3 340 4 370 5 420 the table contains data on different sizes of balls and their corresponding weights in grams. using the scatter plot tool, plot the graph of this data set and find the value of the correlation coefficient using the results of the best-fit line. 0.43 0.23 0.71 0.96

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?