Should one who doesn`t perform prayer out of laziness make it up later, and how should he/she do so?
All perfect praise be to Allah,The Lord of The Worlds He/she is obliged to make up missed prayers by offering with each obligatory prayer another one, and if he/she offers two, then it is better. And Allah Knows Best.
Is it permissible to combine Zuhr and Asr prayers for being occupied with a wedding ceremony?
No, it isn`t permissible to combine Zuhr and Asr, or Maghrib and Isha because of being busy with a wedding since the exemption for combining prayers is based on lawful excuses, and this isn`t one of them. And Allah Knows Best.
When is Istikharah (guidance prayer) Du`a offered, before Tasleem (saying asalamu alikum warahmatu allah wa barakatuh to end the prayer), or after it?
It is offered after Tasleem.
Is fidyah required for someone who breaks their fast due to a valid excuse?
● If the excuse is permanent, such as a chronic illness with no hope of recovery or old age, then fidyah is required. This means feeding one needy person for each missed fasting day.
● However, if the excuse is temporary, such as menstruation, postnatal bleeding, or a temporary illness, then only making up the missed fasts (qada) is required, and fidyah does not apply.