Valerie is done with her Physics "classwork" and is bored from watching Netflix. After watching all the Rocky movies back to back, twice, she decides to fly to Philadelphia for the weekend and run up the steps to Philadelphia Art Museum just like in the movies. Because Pennsylvania is in the beginning of it's third CoVid wave, nobody is on the street to roll their eyes as Valerie runs up the 72 steps (a total height of 15 m) in 45 seconds to make her "Rocky Pose" on the top. What was Valerie's average power output as she ran up the stairs? [Valerie is 110 pounds (50 kg) but is wearing some retro-1970's sweats that weigh 10 pounds (4.5 kg).]