Can someone help me with this question?

QUESTION 21 In June 2001, the adult population in Canada was 24406300, the labour force 16332500 and the number of unemployed individuals 1901900. Assume that after these number were published, you learned that Canada accepted 800000 immigrants, out of which 500000 had job offers and thus are working, and 300000 are looking for jobs. Taking this new information into account, a. Compute the unemployment rate after immigrants' arrival. b. Compute the labour force participation rate after immigrants' arrival. c. Compute the unemployment rate before immigrants' arrival. d. Compute the labour force rate before immigrants' arrival. e. Now assume that 50000 of the 300000 unemployed immigrants stopped looking for jobs and started working under the table. Compute the labour force participation rate after immigrants' arrival