work out number 3,4 and 5.

CASE STUDY 2 - WELDING Students seriously affected by welding Students at the school of Warrington are currently exposed to hazards, risks and accidents in the backyard of the school premises. A private contractor obtained a contract for erecting an iron-sheet covered store. This area is seldom visited by students of teachers and other staffs working at the school. However, prior to the works, the School Headmaster, in his daily assembly, cautioned everyone not to venture in those areas ad not to intervene so as to allow the contractor to perform his allocated tasks. Attention was also drawn to the fact that cutting and welding works would be done and these processes do emit fumes, gases, radiation and noise. The Headmaster not being in the medical field plainly prohibited everyone, just to avoid this risky area and under no circumstances, one should wander or play around unless authorised. A report on welding says that the inhalation of welding fumes and gases, intratracheal administration of welding fume suspensions or distributions and excretions of inhaled welding fumes can result in pulmonary tuberculosis. These can entail the onset of serious effects on health such as lung cancers, chronic respiratory conditions, siderosis and mixed- dust pneumoconiosis, skin cancers, eye irritations, corneal and conjunctival injuries, retinal injuries and vision impairment, cataract and other lenticular effects, loss of consciousness, manganese intoxications, kidney diseases, fertility and potency problems, muscle fatigue, chronic fluorosis, metal fume fevers and scleroderma. Questions 1) Prior to commencing the allocated tasks, what is expected from the contractor pertaining to safety measures? 2) Provide the necessary tools that the contractor should have to start working on site. 3) Excluding the risk of accidents to students and other personnel working at the school, the contractor workers are themselves exposed to risks. Enumerate five (5) such risks with corresponding remedial solutions. 4) It is the responsibility of the headmaster to make the area of having potential dangers a place safe to work. This can be done in conjunction with the contractor. What can you do if you were the employed contractor? 5) The contractor normally makes use of electricity and this is provided through a temporary distribution board. Provide the necessary steps you shall take prior to operating the distribution board