Answer the following questions and please write the process clearly.

QUESTION 19 The two matrices below 2 3 -1 0 A= -2 2 11 15 - 4 -6 2 3 23 -1 0 and B= 0 1 2 3 0 0 0 0 are row equivalent. True O False QUESTION 20 Three water pumps A, B, and C are used to drain a flooded patio. Together, pumps A and B can drain the patio in 6 minutes. When pumps B and C are used together, they can drain the patio in 5 minutes. Likewise, when pumps A and C are used together, they can drain the patio in 4 minutes. How long will it take to drain the patio if the three pumps are used simultaneously? Give your answer correct to 2 decimal places