problem with vector velocity

i'm not a fan a vector velocities and relative velocity..so this is my predicament

In this question, i is a unit vector due east and j is a unit vector due north.

At 0900 hours a ship sails from the point P with position vector (2i + 3j) km relative to an origin 0. The ship sails north-east with a speed of 15 km/h

(i) Find, in terms of i and j, the velocity of the ship.

(ii) Show that the ship will be at the point with position vector (24.5i + 25.5j) km at 1030 hours.

(iii) Find, in terms of i, j and t, the position of the ship t hours after leaving P.

At the same time as the ship leaves P, a submarine leaves the point Q with position vector (47i — 27j) km. The submarine proceeds with a speed of 25 km/h due north to meet the ship.

(iv) Find, in terms of i and j, the velocity of the ship relative to the submarine.

(v) Find the position vector of the point where the submarine meets the ship.

any help would be appreciated