Please solve with good hand writing and clear steps, no explanations needed and thank you

Question 1: You are hired as a civil engineer to design the curve portion of a highway. You are asked to designed for a banked curve with an angle of 18 Determine the radius curvature needed for the curve if the maximum speed allowed over the curve is 120 km/hr. You may neglect the friction in this question. (K:3, 1:3, A:3, C:3) Question 2: A stunt motorcycle enters a vertical circular track with a radius of 15 m. Determine the minimum speed required for the motorcycle to stay on the top position of the track. (K:2, 1:2, A:2, C:2)