Answer
$b_{12}: 3$
Dimensions: 2$\times$2
Work Step by Step
Row 1 Column 2 : 3
There are 2 rows and 2 column, so the dimensions is 2$\times$2
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.