Please explain your answer

Suppose you are a poor farmer in a less developed country without any formal retirement plan. You hope that your children will provide for you when you are old and unable to work. You must depend on the resources of your surviving able-bodied children during your old age. The social/health condition in your village is as follows: about half of all births are female births. Girls that survive move away from their natal homes after marriage (assume all surviving girls marry) and are unable to support their parents after marriage. About 20% boys die within the first five years of birth and about 25% of the boys that do survive, are actually unable to work due to health reasons. You want to have a 90% probability that at least one of your children will take care of you during your old age, what is your desired fertility, i.e., how many children would you like to have? Show your work. Select one: O a. 5.8 O b. 9 O c. 8.2 O d. 6.4