Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Kanika goswami 1
both questions are simple if you know the properties of linear algebra ....but as your query I have solved both questions check attachments.