Factors that make Qurbaani waajib

Upon whom is Qurbaani waajib

Q:

1. Is Qurbaani fardh or an emphasized Sunnah?

2. I have read it is sufficient for a man to slaughter on behalf of his family - is this correct, false or a difference of opinion

3. Can you dedicate a sacrifice in general, but also doing Qurbani for a dead relative (dedicating the reward to them), also can you do this for the Prophet (Sallallahu Alayhi Wasallam) as in dedicate the reward to him? I know it's not a Sunnah, but is it allowed?

Upon whom is qurbaani compulsory?

Q: I have two questions I need to ask. I was talking to my husband yesterday about Qurbaani and we had a disagreement. He told me that Qurbaani is not farz, and my belief is that Qurbani is fardh if you are working and have a steady income. Can you please clarify that for me. Also another question is about zakaat. My husband told me that we already give zakaat in the form of tax, so we don't have to give it anymore, but my questions is about the savings and all the saving plans that we have and the money that lies there, isn't it farz to give zakat on that? Please let me know. I would appreciate it very much.