Please... I need this asap! :) Also, I only need couple of lines answer to the short answer question. Thank you again!

Question 5 5.5 pts A fisher caught a fish 5.0 kg striped bass and the fishing line is 0.55mm in diameter. When the fish is pulled in and hangs vertically from the line out of the water, what is the fractional increase in length (AL/LO) of the fishing line if the fish is at rest? The fishing line has a Young's modulus of 5.1x109N/m2.Question 6 55 pts A student sits on a stool rotating at a rate of 1.2 rev/s with arms stretched out. Assume no friction. The student's moment of inertia with arms stretched out is 4.5 kgmz. The student then pulls her arms to her side decreasing her moment of inertia to 3.2 kgmz. A) What is the resulting angular speed of the student in rad/s? B) What is the change in the rotational kinetic energy of the student? Question 7 5.5 pts You are standing at the rim of a rotating merry-go-round that is rotating counterclockwise. A) What is the direction of the angular velocity? B) What happens to the rotation when you walk towards the center? Give an explanation. Question 8 5.5 pts A 100 cm3 piece of aluminum sits at the bottom of a lake, right next to a 100 cm3 piece of lead, which is much denser than aluminum. Which one has the greater buoyant force on it? Explain