Voting is done in a class consisting of 30 students to determine the study tour destination. One student may choose more than one tourist destination. Based on the choice of tours, it is known that A received a total of 9 votes, B 13 votes, C 7 votes, and D 9 votes. There are several students who choose 2 destinations at once, namely: 3 students choose A and B, 1 student chooses A and C, 4 students choose C and B. Draw the voting results in a venn diagram!

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