Question

Two boats are heading away from shore. Boat 1 heads due north at a speed of 3.7 m/s relative to the shore. Relative to boat 1, boat 2 is moving 35° north of east at a speed of 1.3 m/s. A passenger on boat 2 walks due east across the deck at a speed of 1.2 m/s relative to boat 2. What is the speed of the passenger relative to the shore?

How would i solve this problem I am very confused?