Please help me with the follwing question. Please provide detailed steps. I am studying for an exam so the detailed steps will help me understand the material more.

2b. 2c. 2d. 2e. 2f. 4 2rs 2 6 3 1 6 Let/El: 1 3 1 2 ,b: 2 ,c: 2 ,H: '6\"33 :r,s,teR U 0 l l 2 2 3?" + 3 + t 2 T+23+t Calculate the matrix B = RREF(A) and determine the ranks of A, B, AT and b. If the column space Col[A) is a subspace of RI\