By Kyle Wood Bets and analysis for Monday’s playoff games featuring Game 4 of Celtics-Nets, and Game 5s for Raptors-76ers and Jazz-Mavericks. Two teams’ playoff runs could come to an end Monday night. The Celtics lead the Nets 3-0 in the series and the potential closeout game is in Brooklyn, where Boston already won over the weekend. And the 76ers hold a 3-1 lead over the Raptors as that series heads back to Philadelphia after the Sixers couldn’t finish off Toronto on Saturday. In the late slot is Game 5 between the Mavericks and Jazz, who are tied 2-2. The four-five matchup in the West has be…