yi = at us for 1. 2 I'M where a is an unknown constant and we ~ i .2 d . N ( 0 0 2 ) for all i . Notice that there is no Boo term in this regression

Could you please help me explain OLS(Ordinary least squares)

yi = at us for1. 2I'Mwhere a is an unknown constant and we ~ i .2 d . N ( 0 0 2 ) for all i . Notice that there is no Booterm in this regression equation .( a ) What are E ( yi ) and var ( y ) ? Based on your answer , obtain E ( y ) and var ( y ) , where y( 1 / no ) 1 1 3 2( 6 ) By solving out the following minimization problemmin - ( via ) ?2 - 1 12obtain the least squares estimator of a