Modern History of West Bengal

12345
1.
Who formally granted the Diwani of Bengal after the battle of Buxar?
2.
In which year, Mughal Emperor granted the Diwani of Bengal to British?
3.
Which of the following treaties was signed between British and Mughal emperor in 1765?
4.
Which of these was granted to East India Company after the Battle of Buxar?
5.
How much pension did the Company consider to surrender in 1765?