Compute each part of given question:

Question: In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great deal during the day, and he is blown along the following straight lines: 2.5 km 45° north of west; then 4.70 km 60° south of east; then 5.1 km straight east; then 7.2 km 55° south of west; and finally 2.8 km 5° north of east.

Part A: What is his final position relative to the island?

Part B: Find the magnitude in km, and the direction south of east?

Include work and exact answer please! Thanks!