Starting with an empty skip list, insert the seven keys 30, 10, 25, 20, 15, 70, 12. Draw your final answer. Use the following coin tosses to determine the heights of towers (note, not every toss is necessarily used):

H, T, T, H, H, T, H, H, T, H, H, T, H, T, T, H, T, H, H, T, T, H, H, H, T, H, T, . . .

Just draw a skip list graph.