Answer
0
Work Step by Step
The largest possible rank is 4 because there are only 4 columns. This means the smallest possible dimension of Nul A is 0 by the Rank Theorem.
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.