Use the data in the table below to answer the questions that follow; Age group No of Students in thousands 1955 1960 0 - 16 150 143 17 - 45 51 107 46 -60 29...

Use the data in the table below to answer the questions that follow;

(a) What is the percentage increase in the working population between 1955 - 1960?
(b) Calculate the ratio dependent population to the working population in 1955. 
(c) Calculate the ratio of dependent population to the working population in 1960.
(d) Has the dependency ratio increased or decreased between 1955 and 1960?