1. there is no 進攻有利區/得益區... maybe you are talking about the under the rim, within the dotted line area in NBA, where you cannot take a charge when you are inside that area?
2. only count when you catch the ball and have possession. 接到住個波先計
3. yes, whoever end up catching the ball. Sometimes, you poke away the ball, and your teammate catch it, your teammate will be reward with the steal.