Which of the following signatures is realized by a nilpotent map on r^3? (a) (1,2,3) (b) (1,3) (c) (2,3)

Agroup of five people go out to eat and buy appetizers and main dishes they decide to split the bill so each person pays 20% of the total cost appetizers are $5 and main dishes are $10 write an expression to show how much each person pays explain it with how to solve the problem