Explain how the Zhou discretionary family trust with the following particulars could distribute residual income to minimize tax at the end of the 2021 income year, given the following: Taxable income of $73,000 at the end of the income year. A choice of three beneficiaries, all of whom could be made presently entitled to a portion of the income and are a resident of Australia for tax purposes: 1. Fred who is 45 and has other taxable income of $18,000. 2. Samantha who is 20 and has $10,000 of other income. 3. Beth who is 16 and has no other income. When answering the question please: 1. Work out the most tax effective way of distributing the trust income, showing your workings. 2. Complete tax calculations until the TAXABLE INCOME stage for each of the three beneficiaries.