questions 2, 3, 4, & 5 are in attached files

Sol: (2) Given that

1 2 2 1 1
, ,
3 0 1 6 3
p
A B C
q
     
       
     
So that,

1 2 2 1 1

3 0 1 6 3
2 2 1 2 1

6 0 3 0 6 3
4 1 2 1

6 3 6 3
On comparing b
AB C
p
q
q p
q p

    
    
    
     
   
    
    
   
   
oth sides, we get
4
and 1...