Mylie's total utility from singing the same song over and over is 50 utils after one repetition, 90 utils after two repetitions, 70utils after three repetitions, 20 utils after four repetitions, 50 utils after five repetitions, and 200 utils after six repetitions. Write down her marginal utility for each repetition. Once Mylie's total utility begins to decrease, does each additional singing of the song hurt more than the previous one or less than the previous one? I need solution of this