What does the below rebus riddle means?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

It belongs to you, but other people use it more than you do. What is it?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Bay of Bengal is in which state?

What word is pronounced the same if you take away four of its five letters?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?