If when Bob consumes pizza the marginal utility he receives from piece

#1 45,

#2 40,

#3 30,

#4 15,

#5 -5

Then we can say, That he experiences diminishing marginal utility after consuming---- pieces. -That his total utility after consuming 3 pieces is ----- . That his total utility peaks after consuming---- pieces. That if the cost of a slice of pizza is $2 that his MU/$ for the 2nd piece is-----.