is a second-rank tensor given by, A = 4 3 2 51-1 0 1 3 Using standard index notation and summation convention, give the value of the following: (a) A 2,1 (where the comma is just a spacer so that the indices don't look like the number twenty-one), (b) Aijбji, (c) AijAji.

Confused. Please help:)

The following table shows the weight of a person and the number of hour of exercise they do. Weight 250 180 160 140 135 Hour 0 7 5 8 9 Construct a table with these headings: x-xbar, y-ybar, (x-xbar)2, (y-ybar)2, (x-xbar)(y-ybar), y-^y, and (y-^y)2. Note: ^ symbol is on top of y.  xbar is the mean for weight. ybar is the numbers of hours. ^y=a+bx where ^y is the best line of fit.  Find: a) xbar b) ^y c) b in the equation ^y=a+bx d) a '' '' '' (for each) e) r (the correlation coefficient)

zlog7-i 17. Show that Z (-) :