Q1 O A hot-air balloon rises with a constant speed of 5ms-1 a) If the balloon rises for 1.5 hours find the height it reaches. (3) b) A man standing inside the balloon throws a ball up. If he throws the ball with a constant velocity of 15ms ' find the maximum height the ball reaches as measured from the hot air balloon. (3) c) The balloon continues to rise at the same rate, how far above the ground will the balloon be when the ball hits the ground? (5) [Total 11 marks]