3. Mr Gaglardi stands on the ground some distance from the school wall and looks ata 1.2 kg box that is on top of the roof some distance above him. He res a [LED kg arrow at 25 mils [40\" above horizontal] and watches as it embeds itself in the box just at the peak of its trajectory. The box and arrow then slide off together on the roof. What horizontal distance has the box plus arrow slid when it's still moving at 1.25 mils? Note: there is friction on the roof! {IE marks] u=12