Question: 2. Let A= a, a, a; a, a;, where a is the :-th column of A, fori =1,...,5. It is known thz(t ) 1 2

2. Let A= a, a, a; a, a;, where a is the :-th column of A, fori =1,...,5. It is known thz(t ) 1 2 =3 a s a a and a5 = S 1 0 ' 3 1 y an 5 4 0 1 3 Suppose A is row equivalent to 1 2 1 2 =1 g Jdl=1l 1 =1 R = 00 0 1 1 00 0 0 O (a) (2 points) What is the rank of A? Explain how you derived your answer. 11 5 (b) (5 points) Show that 5 | | 4 is a basis for the column space of A. o o

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