A vertical wall of height 3.75 m is at a horizontal distance of 5 m from a point O on the ground. A particle is projected from O with initial speed 10 m/s at an angle of elevation ø. Given that the particle just clears the wall, find a) the value of tan ø b) the speed of the particle as it passes over the wall c) the horizontal distance of the particle from the wall when it again reaches the level of O. (Take g as 10 m s-2)

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