Consumers in a certain area can choose between three package delivery services: APS, GX, and WWP. Each

Question:

Consumers in a certain area can choose between three package delivery services: APS, GX, and WWP.
Each week, APS loses 10% of its customers to GX and 20% to WWP; GX loses 15% of its customers to APS and 10% to WWP; and WWP loses 5% of its customers to APS and 5% to GX. Assuming that these percentages remain valid over a long period of time, what is each company's expected market share in the long run?