I have teeth but i don't bite. Who Am I ?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Do You See It?

What does this simple rebus mean?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

What can go up a chimney down, but can’t go down a chimney up?