(1) The percentage of C in the sector chart is: 1-21%-52%-6% = 22%;

Xiaoli's number of people in this sampling survey is: 4+621%=51 (people);

Boys who don't like hot pot very much are: 51×22%-5=6 (person),

Boys who don't like hot pot very much are: 51×6%-1=2 (person),

The supplementary picture is as follows:

So the answer is: 22%, 51;

(2) Draw a picture according to the meaning of the question as follows:

*** In 6 cases, the probability that the two elected citizens happen to be men is 26 = 13.