Biology homework help

an archer shoots an arrow with a velocity of 45m/s at an angle of 50.0degree with the horizonatal. an assistant on the level ground 150m downrange from the lunch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. a)what is the initial speed necessary to meet the path of the arrowb)at what time after the arrow launch should the apple be thrown so that the arrow hits the apple?