(a) Refer the given image carefully : (Two pie charts titled "Distribution of Employment by Gender". Male Workers : Self-employed 51%, Regular Salaried Employees 20%, Casual Wage Labourers 29%. Female Workers : Self-employed 56%, Regular Salaried Employees 13%, Casual Wage Labourers 31%.) Compare and analyse the distribution of work force with respect to gender. (b) State the meaning of worker-population ratio.