Some questions asked by my younger sister to me.

Hey friends !!

Yesterday while i was relaxing  and reading a book and my younger sister approached me and asked me some questions ..Literally i was confused and i could'nt make out what to answer..

The questions are as follows:

1. Jisne Dictionary banayi usne meanings kaha se likhe ?

2. Use kaise pata ki sab words aa chuke hai aur koi baki nahi rah gaya ?

3. A,B,C...Z ka alphabetical order kisne decide kya ?

4.Use kaise pata ki Z ke baad aur koi alphabet nahi hai? 

Now u tell she is 5 years younger to me ..what answers should i give her ?  Ha..ha ..ha...