How does a mirror effect the path of light?

Ineed the answers for these promblems i have

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped