need help for documents for my mom ( visit visa)

hii

i am uk passport holder
i am planing to apply family visitor visa for my mom for ten years
my mom is in India
can u please advise me what documents i need to send to my mom and what documents my mon need to drop a visa

how much money she need to show on her bank account? how many days ?

how much i need to show the funds in my bank and how many days

please let me know asap guys
thanks in advance