Ritika needs your help in retirement planning. She is 35years old and would like to retire at the age of 55. She estimates that post-retirement she would need ₹ 10,00,000 per annum for the next 20 years to meet her living expenses. The rate of return on her investment portfolio is expected to be 8 % per annum. Determine the retirement corpus needed to provide her an annuity of    ₹10,00,000 for 20 years. Assume that the annuity is needed at the beginning of each year.