Please help me understand how to complete the problems

1. A 2D data set S' has the following averages and SDs. _El The correlation coefcient is r = 0.8. The scatter diagram of the data set S is football-shaped. Let L be the regression line to estimate y from 11:. a. Find the r.m.s. of the regression line L. b. Estimate the ycoordinate of a point in the data set 8 whose m-coordinate is a: = 108. How likely is this estimate to be off? c. Estimate the y-coordinate of a point in the data set 5' whose m-coordinate is ac = 101. How likely is this estimate to be off? (1. Estimate the ycoordinate of a point in the data set 3 whose m-coordinate is an 2 98. How likely is this estimate to be off? e. From all the data points in S with ac-coordinate a: = 108, nd the approximate percentage of these points whose y-coordinate is in the interval [458, 478]. f. From all the data points in S with :c-coordinate :c = 108, nd the approximate percentage of these points whose y-coordinate is in the interval [464, 484]. g. Find the approximate 90th percentile of the y-coordinates of all the data points in S with :c-coordinate ac : 108