Tax regarding capital gain & int on fd

Dear Sir/Mam,

One of My Colleague who worked with me got retired 2-3 years back. Now he want a advise for his Tax returns.

1) He is having the FD & Interest earned  on that is arround Rs.3 Laks.

2) He Sold his Flat which was purchased for Rs.28 Laks & sold for Rs.32 Laks. Now he statrted Constructing a house in his own land. ( He is not taking Housing Loan for New Construction)

Please Advise how to calculate his Tax earnings & also can he get  any Exemption for housing construction?.