Mylie's total utility from singing the same song over and over is as shown in the table below.

a$.$ Write down her marginal utility for each repetition.

Instructions: Enter your answers as whole numbers. If you are entering any negative numbers be sure to include a negative sign $(-)$ in front of those numbers.

$\backslash$table$[[$Repetitions$,$Total Utility,Marginal Utility$],[1,70,],[2,110,],[3,90,],[4,40,],[5,-30,],[6,-180,]]$

b$.$ 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?

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