4. Melissa created an irrevocable trust using investment assets worth $300,000. The rate for calculating split gifts was 4%. Melissas friend Murray, age 50, will receive all the income, payable annually for his lifetime. At his death, all principal will pass outright to another friend, Marci, age 30, or to Marcis estate. (a) Calculate the current value of Murrays and Marcis property interests. (b) Calculate the values if Murray was 60 and Marci was 80 when Melissa established the trust. (c) Comment on the influence of the parties ages on the values.