A punter kicks a football. Its height, h, in metres, t seconds after the kick is given by the equation h(t)=-4.9t²+18.24t+0.8 . The height of an approaching blocker’s hands is modelled by the equation b(t) = -1.43t +4.26 using the same time. Can the blocker knock down the punt? If so, at what point will it happen?