Two loans availed for same property for construction

Please elaborate your quarry in more systematic way

Sir

my staff received the following Housing loan on various day for construction of one house his use and got Loan certificate on following basis.

S.No    Purpose of Loan        Amount of loan    Prinpal Amount            Interest      Date of Sanction of Loan 

1    Construction of house       35 lakhs              0.90 lakhs                1.37 lakhs        13.04.12   

2    Construction of house       10 lakhs              0.30 lakhs               0.65 lakhs        13.02.13      

3    Construction of house      5 lakhs                 0.20 lakhs               0.35 lakhs        13.07.13   

4    Construction of house     5 lakhs                   0.25 lakhs              0.36 lakhs        13.03.14

Pleae tell How Much Interest & Principal Amount is Eligible for Deduction under section 24(b) And 80C