Research we need to find out the effective tax rate from the income statement of 5 companies

This assignment is a Major Research report of 5000 words.In this research we need to find out the effective tax rate from the income statement of 5 companies, which were taken from ASX and the companies are :Woolworths, Wesfarmers, BHP, Rio Tinto, Myer.The weightage of this assgn is worth 70% and I need to get atleast 60% to pass this subject and also after the completion we need to upload it in Turnitin so please be very careful about plagerism. I want this assgn to be done using high standard English and also have footnotes and proper referencing please.Make sure that you include Income Statement of these companies when discussing about tax rate.