2. The dependency ratio is the proportion of young and old age groups (generally ages l} to 14 and ages 65+) divided by the remaining ages (1564}. Why is the dependency ratio a useful for demographic analysis? Describe the time path of the youth dependency ratio and elderly dependency ratio dur ing economic development as a country experiences the Demographic Transition. From an economic standpoint discuss why the young, and old dependency ratios are individually more informative than the combined ratio. 3. True, False or Uncertain. Please label the following statements as True, False or Uncertain (i.e., some times true or sometimes false) and briey support your answer. Credit will be given for the supporting argument. (a) Within stable population theory, a reduction in agespecic mortality rates increases the mean age of the population. (b) According to Malthus, the effect of economic conditions on fertility was indirect and operated through the age at marriage. (c) According to Malthus, preventive checks on population growth include famine, disease, and war. (:1) According to the demographic transition societies move from highfertility and highmortality to lowfertility and lowmortality and that the reduction in fertility always precedes the decline in mortality. (e) According to Angus Deaton there is a positive linear relationship between per capita wealth and life expectancy