Team control throwin. Foul purposes only

[BillyMac]

A1 has possession out of bounds for a throwin. Before A1 releases his throwin pass, A2 sets an illegal screen against B2. Team control foul charged to A2. No free throws for B2.

A1 has possession out of bounds for a throwin. A1 releases his throw pass and A2 catches the ball inbounds, obtaining player control inbounds and thus team control. A3 then sets an illegal screen against B3. Team control foul charged to A3. No free throws for B3.

A1 has possession out of bounds for a throwin. A1 releases his throw pass and A2 catches the ball inbounds, obtaining player control inbounds and thus team control. A2, after catching the ball (holding, possession) immediately fumbles the ball. During the fumble, A3 sets an illegal screen against B3. Team control foul charged to A3. No free throws for B3.

A1 has possession out of bounds for a throwin. A1 releases his throw pass and A2 touches the ball inbounds but never obtains player control inbounds (no holding, no possession), and thus never obtains team control inbounds. The legal touch by A2 inbounds ends the throwin. During the loose ball, A3 sets an illegal screen against B3. Team B is in the bonus. Is a team control foul charged to A3 (thus no free throws for B3), or does B3 shoot free throws?