A woman, age 20 , buys a 40 - year insurance policy with the following benefits: $20,000 if death occurs before age 40 $30,000 if death occurs between age 40 and 60 $40,000 if the woman survives to age 60 Which/of the following would give the correct net single premium? (1) 40,000A20:0010,000A20:4010,0001A20:201 (StaCk) (II) 20,000A20:201+30,00020A20:201+40,00040A20 (III) 20,000A20:401+10,00020A20:201+40,00040E20