Determine the deductible charitable contribution in each of the following instances. a. Charitable contribution of $2,500 and taxable income before charitable contribution of $40,000. b. Charitable contribution of $5,000 and taxable income before charitable contribution of $40,000. c. Charitable contribution of $2,925 and taxable income before charitable contribution of $40,000. Taxable income includes a net operating loss carryforward of $3,250. d. Charitable contribution of $2,925 and taxable income before charitable contribution of $32,500. Taxable income includes a capital loss carry back of $3,250.