If the tangent line to y= f (x) at (4,2) passes through the point ( 0,1), find f (4) and f′(4).

f ( 4 ) = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

f ′ ( 4 ) = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

f ( 4 ) = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

f ′ ( 4 ) = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _