Can a rogue draw and throw two weapons every round without the Dual Wielder feat?

Cleric 2/Wizard 2 finds a 2nd level spell in a book, can he copy 2nd level wizard spell into his book?

Does the bonuses of Rod of the Pact Lord, and Wand of the War Mage stack?

Would a large creature take damage from a fireball spell if only one square was hit?