Table:
text: 1988–89 Philadelphia Flyers season
Playoffs
Patrick Division Finals
Game Date_ Opponent Score Series
1 April 17 @ Pittsburgh Penguins 3–4 Penguins lead 1–0
2 April 19 @ Pittsburgh Penguins 4–2 Series tied 1–1
3 April 21 Pittsburgh Penguins 3–4 OT Penguins lead 2–1
4 April 23 Pittsburgh Penguins 4–1 Series tied 2–2
5 April 25 @ Pittsburgh Penguins 7–10 Penguins lead 3–2
6 April 27 Pittsburgh Penguins 6–2 Series tied 3–3
7 April 29 @ Pittsburgh Penguins 4–1 Flyers win 4–3

Question: What is the highest game for the Philadelphia Flyers in the 1988-89 Patrick Division Finals, Playoffs season that has April 21 as its date?

Question: What score has a game less than 4 and April 19 as the date for 1988-89 Philadelphia Flyers Season Patrick Division Finals Playoffs?

Question: Which opponent has a game under 6 and April 17 as the date for the Patrick Division Finals of the 1988-89 season?