Proportion of Xicheng District: 4605/ 12000=0.38375.

Proportion of Chengnan District: 3795/12000 = 0.31625.

North city ratio:1200/12000 = 0.1.

So:

Dongcheng District: 60*0.2= 12 people.

Xicheng District: 60*0.38375=23.025 is about 23 people.

Pumping in Chengnan District: 60 * 0.31625 =18.975 is about 19 people.

North draw: 60*0. 1=6 people.