save tax in case of salary

if a person is having the salary income of rs.4,00,000/- (four lakh) total.

if he has invested rs.1,00,000/- as per section 80c.

if he has taken a mediclaim of rs. 15,000/-.

if he has invested 20,000/- in infra bond.

if he does not have any loan.

than how can he save tax?

please give the answer and check your knowledge because in future all the students have to face this kind of questions?