Yes. They can write the Will joint for their joint properties. Consult a senior Document Writer or an advocate who drafts documents.
The answer is yes.
There is no specific format for Will. But it should contain
1. Name/s of Beneficiaries
2. Full details of assets and
3. Confirmation that the Will is made with balanced mind
It's better you contact a good Lawyer to write your Will. Although it's not compulsory to register the Will, it is better to register the Will which will save much hard work for the beneficiary/ies.
It can be a joint will.
Format may be taken from a local lawyer / tutor or coaching institute.
Yes,husband and wife can execute joint will