CANTILEVER SLAB AND SLABS SUPPORTED WITH 3 BEAMS IN RCDC

Hello as we know, RCDC detects slabs if we have a closed loop of beams, then

1.Is there any trick to model a cantilever slab in RCDC? if yes, then how?

2.case two how can i create a slab supported with 3 beams in RCDC?

if there is any OnDemand course about the mentioned scenario please help me with a link