Use the addition table to answer part (a) through (d). Click the icon to view the addition table. Write a rule for finding such sums almost at a glance. Choose the correct answer below. A. Sum = (upper right entry) +4 B. Sum=4x (upper right entry) C. Sum = (upper left entry) x (lower right entry) D. Sum = (upper right entry) - 4 E. Sum 2x (upper right entry) (b) Find the sum of the entries in these squares of entries from the table. 0 1 2 1 2 3 2 3 4 10 11 12 13 11 12 13 12 13 14 14 15 Sum = 108 Sun Sum=18 (c) Write a clear and simple rule for computing these sums. Choose the correct answer below. A. Sum (upper left entry) x (lower right entry) B. Sum = (upper right entry) - 3 c. Sum = 9x (upper right entry) OD. Sum=4x (upper right entry) E. Sum = (upper right entry) +9