[填空题]
A school basketball team of 5 students is sele*+f2c (ts m-+ktlpjszcted from 8 bohb fdzl4p s2ll 2af;v2v6mr4; kkv;c7ys and 4 girls.
1. Determine how many possible teams can be chosen.
2. Determine how many teams can be formed consisting of 3 boys and 2 girls?
3. Determine how many teams can be formed consisting of at most 3 girls?