I have 89% of the values correct but I'm not sure where I'm going wrong exactly.
For the first ones, the first row is being multiplied by 2 and then multiplied by 1/2, so I multiplied the identity matrix's first row by those amounts.
For the second ones, the second and third row are switched for both so I switched the second and third row of the identity matrix for both as well.
For the third ones, the first row is being added to 4 times the second row and -4 times the second row. So I switched the the first and second row of the identity matrix and multiplied it by 4 and -4 respectively. I have a feeling that this is where I'm going wrong but I'm not sure why.