If A is a 3 × 4 matrix and B is a matrix such that both AT B and BAT are defined, what is the order of the matrix B?

If A is a 3 × 4 matrix and B is a matrix such that both AT B and BAT are defined, what is the order of the matrix B?

Matching exercise

Match the items on the right to the items on the left.

Step - 1

Step - 2

Step - 3