. Consider a hypothetical population with 4 age groups (each corresponding to a year of age). The following table gives the number of people at each age (P(a), counted at the middle of a calendar year), the number of females W(a) at mid-year, and the number of births B(a) occurring over the full calendar year: Age P(a) W(a) B(a) Age 0 10 5 Age 1 8 Age 2 4 Age 3 ONNO What is the crude birth rate in this hypothetical population? Calculate the age-specific fertility rates. Calculate the total fertility rate. Draw and carefully label the population pyramid, expressing each age sex group in terms of its percentage of the entire population. Please give explanations along with your results