Make a new Matlab function that fits a line to data in a least-squares sense. Call it LSQLinear.m. It should take 2 inputs: a 1xN array of r values and a 1xN array of y values . It should return 3 outputs, ao, a1, and E. The first two outputs describe the line: yao ar. The third output E is the total residual error. See our lecture slides for a complete definition of E