A standardized test consists of three parts. 600 people took the test last year. 340 people passed part I, 340 people passed part II, 390 people passed part III, 260 people passed parts I and II, 270 people passed parts I and III, 300 people passed parts II and III, and 230 people passed all three parts. In the Venn diagram below, the circles I, II and Ill represent the people who passed parts I, II and III, respectively. Find the number of people in each region. a = b d = e = g = h = 8 d a C b e h