A contract on (70) provides for a payment of 1000 at the end of 3 years. If (70) is then alive, and is to be paid for by three - level annual premiums. For death in the first year, nothing is paid. For death in the 2^nd or 3^rd years, all premiums paid are returned with interest at the end of the year of death. You are given that q₇₀=0.1, q₇₁=0.2, q₇₃=0.3 and i=25%. Find the annual premium.