The resulting matrix is a:
1 by 2  3by 1   2 by 1
                                             
                                          
                                          
                                        
											 
											Answer:
2 by 1.
Step-by-step explanation:
Hi. I just took this quiz, chose 3 by 1 (per the answer above) and got it wrong. So, my score was an 83.3%. To save you from earning the same grade, this answer was the correct one.
Hope it helps.