Directions: Study the following information carefully and answer the given questions.

Ten students M, N, O, P, Q, R, S, T, U and V decided to visit abroad. For that, they bought tickets for three different transport i.e., plane, train, and ship. Train ticket is the cheapest and Ship ticket is the costliest. 

Minimum 3 people and maximum 4 people bought tickets for the same transport. No two persons with initials immediately succeeding or immediately preceding letters bought the ticket for the same transport. If two people bought tickets for the same transport it means they are traveling together and vice-versa.
N bought the ticket of ship. Q bought the ticket of plane. R did not travel with N. Four people bought the train tickets. M bought tickets with P. U bought the costliest ticket. V did not travel with O.