Given a linear regression model: Y=a+B, X,+B,X,+ following statements is correct? a. Multicollinearity happens if Xi is linearly correlated with X2 . b. Multicollinearity happens if X is linearly correlated with E. c. If b, = 0.1 , X, is not a significant variable under the 95% confidence level. d. If b,=-0. 03. X, is a significant variable under the 95% confidence level.

Explain pls