can someone please help me with this question and show working so i understand

Q1a)

A walkway is being built on the 4th story between two tall buildings. After one day of going all the way down to the ground level, then across to the other building, and then back up another 4 stories, the workers decided to devise another way of getting between the buildings. After some brainstorming, the workers decide to suspend 3.3 m long, 36 kg beams from the walls of each building. This way, it is a lot faster to move materials from one side of the proposed walkway to the other (from one building to the other). The beams are set and secured at 90" to the walls of the buildings and are suspended by attaching wire cable to the very end of the beam and anchoring it into the wall of the building at 29" to the horizontal. The wire cable themself are rated at a maximum tension of 2500 N. To make sure that the wires suspending the beams do not break as the workers carry materials across them, they need to know how much mass the beams can hold when they step from the end of one beam onto the other (they are not connected), very carefully. One such worker has a mass of 92 kg and will be walking along one of these beam setups. They do not really trust this engineering feat, so they want to be sure that they can carry the materials required, from one building to the other via these beams safely. Apart from pondering the logistical and workplace health and safety nightmare that this situation would cause, calculate the maximum mass that this worker can carry across the beams from one building to the other. Give your answer to 2 significant figures.We have all seen the old "Wild West" movies where the cowboys run around shooting their guns into the air. Have you ever wondered where the bullets go? Once a bullet of mass 25 g leaves the barrel of a gun it travels at about 0.13 times the escape speed from Earth. If shot directly upwards, and neglecting the rotation of the Earth, how high above the Earth's surface would the bullet reach? Give your answer as a multiple of the Earth's radius and to 2 significant figures.An eardrum can mimic the movement of a spring-block system as it vibrates. The amplitude of an eardrum movement is likely to be about 6.9 x 107 m with a frequency of 520 Hz. If the mass of the eardrum is 14 mg, what is the total energy of the eardrum in this situation? Assume that the eardrum only vibrates in the horizontal direction. Give your answer to 2 significant figures