Is there a good way of showing a conditional composition in SysML? For example, a wheel could be composed of either a rim and a tubeless tire OR of a rim, a tube, and a tire?

I want to correctly model my RT/Embedded SW activity as a UML activity diagram.
My activity comprises two phases, where Phase 2 runs some (relatively “long”) time after Phase 1 has completed. (And, btw, so they are not parallel.)

I want to correctly model my RT/Embedded SW activity as a UML activity diagram.
My activity comprises two phases, where Phase 2 runs some (relatively “long”) time after Phase 1 has completed. (And, btw, so they are not parallel.)

Questions – About whether UML classes can appear with dashed borders according to strict UML definition: