need help with 7.19

7.17 Use Excel to calculate the resultant matrix X = above. 'Q' for matrices P and Q 7.18 Use MATLAB to calculate the resultant matrix X = P-'QT for matrices P and Q above. Use matrices R and S below for Problems 7.19 and 7.20. 0 1 1 0 2 -2 R=0 4 1 -1 3 2 -1 4 1 -3 0 1 2 11 -7 S= 3 -17 0 2 0 1 1 5 5 7.19 Use Excel to calculate the resultant matrix Z = R 'S for matrices R and S above. 7.20 Use MATLAB to calculate the resultant matrix Z=R 'S for matrices R and S above