T, a citizen and life-long resident of Japan, comes to the United States on July 5 of year 1 on a two-year assignment to the New York office of Ts employer, a Japanese corporation. T stays in the United States continuously until June 20 of year 3, when T returns to Japan, where she stays for the remainder of the year. Ts only other visit to the United States was in January of year 1, when she traveled to Hawaii for nine days of vacation. Ts income consists of salary and income from investments in Japan. How will she be taxed by the United States for years 1, 2 and 3?