After he is "reformed" by yukon, everyone decides to keep the abominable snowman around because he can put a silver star on top of christmas trees without a step-ladder. assume santa's tree is 40 feet tall and the star has a mass of 10 kilograms. if santa wants the job done quickly, in under 1 minute, which of the following motots would need to be used if the abominable snowman is not available?

(a) 18 watts, 120% efficient
(b) 15 watts, 90% efficient
(c) 25 watts, 80% efficient
(d) 20 watts, 80% efficient