D&D 5E - Spell Slots by Class

A full caster — one that can potentially learn 9th level spells — adds 1 level to the basic caster table You determine your available spell

You do not add your warlock level to your other levels when determining how many spell slots you have on the Multiclass Spellcaster table

multiclass spell slot table Table, producing unpredictable but exciting The Artificer's multiclassing rules allow you to round up when determining spell slots

slot games at megaways casino SUPPORTS 5eSPELLS AND MULTI CLASSING - Added level 13-20 - Spells can be cast using higher spell slots