2.2. The premiums for a 15 year endowment insurance of $4000 issued to a life aged 35 are payable quarterly in advance. There is an initial expense of 2% of the sum insured. At each premium payment time, including the first, there are renewal expenses of 0.3% of the sum insured and 5% of the monthly premium. Based on a 6% annual interest rate, find the gross monthly premium and the expense loading of it.