content area top Part 1 Fill in the missing numbers along the sides of the triangle so that it contains each of the numbers from 3 through 11 exactly once. Furthermore, each side of the triangle should contain four numbers whose sum is 28. 3 7 11 A B C D E F Question content area bottom Part 1 The pair of numbers that can be used for A and B is enter your response here, the pair of numbers that can be used for C and D is enter your response here, and the pair of numbers that can be used for E and F is enter your response here. (Use a comma to separate answers as needed.)