Answer question based on the following information:

On a certain day six passengers from Chennai, Bangalore, Kochi, Kolkata, Mumbai, and Hyderabad boarded the New Delhi bound Rajdhani Express from TataNagar. The following facts are known about these six passengers:

1.The persons from Kochi and Chennai are less than 36 years of age. Person Z, the youngest among all is a doctor.

2.The oldest person is from Kolkata and his/her profession is same as that of the person who got down at Mughal Sarai.

3.The person from Bangalore, Chennai, Hyderabad and Mumbai got down at four different stations. The eldest among these four got down at Koderma and the youngest at Kanpur. The person who got down at New Delhi is older than the person who got down at Mughal Sarai.

4. The engineer from Bangalore is older than the engineer from Chennai.

5. While arranging the teachers in increasing order of age it was observed that the middle person is as old as the engineer from Chennai.

6.Person Y who got down at Mughal Sarai is less than 34 year old.

7.The teacher from Kochi is four year older than the 31 year old doctor who is not from Mumbai.

8.In the past, three of the travellers have served in the Indian Army.