2.93 Find the sum of the residuals. Here are the 16 residuals for the NEA data rounded to two decimal places:

0.37 −0.70 0.10 −0.34 0.19 0.61 −0.26 −0.98
1.64 −0.18 −0.23 0.54 −0.54 −1.11 0.93 −0.03

Find the sum of these residuals. Note that the sum is not exactly zero because of roundoff error.