In the following figure, rectangle represents Doctors, circle represents Essayists, triangle represents cooks and square represents Europeans. Which set of letters represents Essayists who are not cooks?
The incomes of S and T are in the ratio 3 : 4 and their expenditures are in the ratio 1 : 1. If S saves Rs 4000 and T saves Rs 22000, then what will be the income (in Rs) of S?