10 External area of cylindrical chimney:10 * (3.14 * 0.2 * 5) = 31.4 (square meter).

The area of the part to be painted is 3 1.4 (m2).

Need to buy paint: 3 1.4*0.5= 15.7 (kg)

2. Install a circle of neon lights on the upper side of the pool along the curve. The length of the neon lamp to be bought is: 3. 14*4= 12.56 (m).