Please answer with work fully shown. :)

8. Find the rank of each of the following matrices from its echelon matrix and comment on the question of nonsingularity. 7 63 3 a) A= 0 1 2 1 8 0 0 8 2 79 b) B = 1 10 0 59 -3 9. Linear independence among the rows of a matrix means that one or more rows can be expressed as a linear combination of some other rows. In the echelon matrix, linear dependence is signified by the presence of at least one row with only zeros. What provides the link between linear dependence among the rows of a matrix and the presence of rows with zeros in its echelon matrix