If y = In(a) where a E 1, 2) is rotated about the y-axis, then the area of the surface of revolution is given by 1 0, 2, In (2) or 1? 1 + dx Incx) , ex , e 24 , 4 , ( n(x))2 , ory ? 1 , 0 , In ( 2 ) or 2? y , x , In( x )orey or . N same options 2TT . N 1 + as above dy