Hold'em table

Q4o is too weak to complete or raise from the small blind out of position against the big blind.

Opening on the button with an ace in 3-handed play is standard to apply pressure and take position.

In three-handed play the button open is wide, so I 3-bet KJo from the small blind to take the initiative instead of calling out of position.

5s8h is nearly the worst starting hand, and facing a raise plus a re-raise with 550 to call gives no profitable way to continue. Folding saves chips for better spots.

A6o is too weak to call a 3-bet out of the small blind, even with position.

T6o is too weak to open from the button for 100 chips; it is dominated and plays poorly even in position, so folding preserves the stack.

Heads-up, Q9o is strong enough to attack the big blind; a raise builds the pot with position-equity as SB.

96o is too weak to defend against a 3x SB raise.

Blind vs blind scenario where A2o has an ace blocker and good steal equity against the big blind.

Q9 offsuit is too weak to continue against a 3bb raise; it is dominated often and does not realize equity well enough to justify calling.

Opening Queen-eight offsuit from the button in three-handed play to steal blinds and realize positional advantage.

98o is too weak to continue from the small blind facing a button raise, especially with the big blind still to act. Folding avoids a dominated, out-of-position spot.

2-6 offsuit is nearly the worst holding, and calling out of position against a preflop raiser gives me no edge even with good pot odds. Folding and preserving chips is clearly best.

K5 suited is a reasonable button open in three-handed play. A 2.5bb raise takes the initiative and can fold out weaker hands before the flop.

T6s is far too weak to defend the small blind against a 2.5x button raise, especially out of position with the big blind still to act. Folding preserves chips for better spots.

73s is too weak to defend out of position against a 2.5bb button raise.