In 2005, the racial composition and mean incomes of a company's employees were 150 White, 50 Black, and 50 Hispanic (non-white), with mean incomes of $37,000, $22,000, and $23,000, respectively. Ten years later, in 2015, the data were 90 White, 60 Black, and 100 Hispanic, with mean incomes of $40,000, $23,000, and $25,000, respectively.(a) What was the mean income trend for each racial group between 2005 and 2010?(b) What was the mean income trend for the whole company between 2005 and 2010?(c) If you worked in the company's HR office, how would you explain the company's income trend to a prospective employee?