Consider the situation of retired couple, Hannibal and Clarice Lamb. Hannibal is 71 and earns a considerable amount of company pension income from his many past employers. Clarice, his sprite 80-year-old common-law wife, earns considerably less income coming from a modest past employer pension income and the OAS. Nevertheless, she insists on paying for all her own expenses. To that end, she has directly paid for her university tuition, medical expenses and charitable donations to her favorite charities. Required: Based on the above information, and in a concise point form format list at least 4 or more things that this particular couple can do in filing their tax returns, regardless of who earns the income or who pays the expenses, so as to minimize their combined overall federal tax burden.