a new obstacle course is home to several new types of challengingobstacles. one such obstacle is traveling a 15 stair case. to make it more challenging the stairs are not uniformly spaced rather the vertical space between consecutive stairs for the first ten stairs is 1 1/3 feet and the vertical space for the last 5 stairs is 1 3/4 ft what is the total vertical distance travelled ascending the entire 15 stair case