A 4×34 \times 34×3 matrix AAA is not written out entry by entry — it is defined by a rule. With the rows numbered i=1,2,3,4i = 1, 2, 3, 4i=1,2,3,4 and the columns numbered j=1,2,3j = 1, 2, 3j=1,2,3, every entry is
Ai,j=2i+3jA_{i,j} = 2i + 3jAi,j=2i+3j
What is the sum of the entries in row 3 of AAA?
Select all that apply.
393939
565656
363636
212121