Two students, Carter and Jamie, had a picnic with their teacher Mrs. Duval. Mrs. Duval brought three sandwiches of equal size, cutting the first into thirds, the second into fourths, and the third into sixths. Carter ate two pieces of the first sandwich, which was cut into thirds, so he ate 2/3 of that sandwich. Jamie ate two pieces of the second sandwich, which was cut into fourths, so he ate 2/4 of that sandwich. Mrs. Duval ate three pieces of the third sandwich, which was cut into sixths, so she ate 3/6 of that sandwich.