You know .
So perform these multiplications to give you a set of equations to solve for .
On the contrary, i thought it would be easier and clearer if i attached it as a file.. i'll make sure to type it out next time.
If you are willing to help...I managed to find Matrix M as ( -1 3 1 )
0 4 2
1 -1 1
However for the second part M-1p i keep getting ( 1 ) .. which is wrong..