can you do 1.23 and 1.26

In Problems 1.19 through 1.32let A=[1324]B=[0122]C=321532011D=246246123E=123F=[1,2,3] 1.19 Find (a) A+B;(b)3A;(c)2A3B;(d)CD; and (e)A+F 1.20 Designate the columns of A as A1 and A2, and the columns of CasC1,C2, and C3, from left to right. Then calculate (a) A1A2;(b)C1C2; and (c) C1C3. 1.21 Find (a)AB;(b)BA;(c)(AB)r;(d)BrAT; and (e)ABT. 1.22 Find (a)CD and (b)DC. 1.23 Find A(A+B). 1.24 Find (a)CE and (b) EC. 1.25 Find (a)CF and (b)FC. 1.26 Find (a) EF and (b) FE. 1.27 Transform A to row-echelon form. 1.28 Transform B to row-echelon form. 1.29 Transform C to row-echelon form. 1.30 Transform D to row-echelon form