How sensitive are your regression results in Exercise 3.1 to small changes in the data? In particular,

Question:

How sensitive are your regression results in Exercise 3.1 to small changes in the data? In particular, how do your regression results change if
a. The quantity in the first row of Table 3.1 were 2.0 instead of 1.5?
b. The quantity in the second row of Table 3.1 were 2.7 instead of 2.2?