Well, Smart was responsible for 1/2 those shots, going 2-8.
Speaking of Smart, Forsberg has a nice longish article on him today here:
http://www.espn.com/nba/story/_/id/23387182/boston-celtics-guard-marcus-smart-putting-unique-stamp-playoffs-nba
Interesting to note, that Smart has been the worst offensive player in the playoffs by a lot. According to Forsberg, "Smart, his right shooting hand bandaged to protect his thumb, is having a cringeworthy offensive postseason since returning from injury. Of the 102 players with at least 40 possessions finished through Tuesday's games, Smart is dead last while averaging 0.592 points per play, according to Synergy Sports data. No player in the top 100 is below 0.7."
OTOH, he does things like this: in the 17 plays where Smart finished the possession guarding Simmons, the Sixers
as a team went 1-12 and 0-7 from 3P land. Simmons himself went 0-1 with 0 assists.
I can see a scenario where Smart signs his restricted tender and goes for UFA next year.