2. Say you have two models with respect to the same response variable Y. Model 1 has all the p-many explanatory variables that Model 2 has but also an additional new explanatory variable. Thus Model 1 is Model 2 (X] to Xp in it) but with an extra explanatory variable (Xpi). Model 2 is nested under Model 1. For each part, state whether the answer is yes (or very likely to be yes), no (or very likely to be no), or need more information/maybe. Explain in a sentence. a. The adjusted R-squared (not the regular R squared, but the adjusted one) of Model 1 is more than Model 2. b. Model 1 has a higher sum of square total (SSTO) than Model 2. c. Model 1 has a higher sum of square error (SSE) than Model 2. d. The slope Bi on the first explanatory variable, X1, is the same in both models