A weightlifter consists of a basal metabolic rate of 80.0W. As he is working out, his metabolic rate raises by around 650W. (i) Determine how many hours does it take him to work off a 450 calorie bagel when he stays in bed all day? (ii) Determine how long does it take him when he is working out? (iii) Compute the amount of mechanical work essential to lift a 120 kg barbell 2.00m (iv) He drops the barbell to the floor and lifts it continually. Determine how many times per minute should he repeat this procedure to do an amount of mechanical work equivalent to his metabolic rate rises of 650 W throughout exercise? (v) Could he in reality do repetitions at the rate found in part (iv) at the given metabolic level. Describe?