If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Take away the whole and some still remain. What is it?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

In a kingdom, King George did not allow any citizen to visit the world outside. Also, only a person with proper paperwork was allowed to enter or he was sent back. A wooden bridge was what connected the kingdom to the world. The king had appointed a sharpshooter who would check the every five minutes on the bridge to check. After checking, he would go back to his hut and return exactly after five minutes again. The bridge took 9 minutes to cross.

A merchant was able to escape the kingdom without harming the shooter. How?

Can you find a rabbit in the given picture?