Refraining from asking the husband questions which may irritate him

Q: My husband recently started a new business course. I asked him how many women are there in the class and he got very angry and said I am pathetic and a sad person.

1. Islamically is it okay for a wife to enquire such things from her husband?

2. Can you please refer me to specific duas to help our marriage and to calm my husband down as he has a very bad short temper (with everyone).

Unpaid zakaat of the deceased and fidyah for the missed Salaahs and Fasts

Q: I am required to pay the religious liabilities and obligations of my deceased father . I am unsure about the various categories of the obligations for e.g. unperformed Salaah, zakat , unkept fast. I wish to settle the amount up to a maximum of 1/3 of the estate but I am unsure how to categorize the payment . How is the obligation defined/ categorised?