Hi I need help on what is the answer to this problems? Below is the question and other concerns will be in the comment section. I hope you can help me and surely I will give you full positive feedback

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For problem-solving items, kindly provide a complete solution and illustration for each item. For conceptual questions, answer each question concisely with your own understanding of the concepts discussed. 1) Calculate the total mass (kg) of a person climbing a hill 200 meters high if the work done is 186.2 kJ. 2) A 62 kg student does 55 pushups in 45 seconds. With each pushup, the student must lift an average of 68% of the body mass a height of 41 cm off the floor. aj Calculate the work the student does against gravity for each pushup. Assume that work is done only when pushing upword. bj Calculate the total work done against gravity in 45 seconds. cJ Calculate the power generated for this period. 3) The largest bulldozer ever built had a mass of about 1.5 x 105 kg and a blade 7.4 m wide. Its two engines had a total maximum power output of about 1.7 MW. How much work (in megajoules) could this machine do each hour