Please answer A, B, and C

Based on the model N(1153,86) describing steer weights, what are the cutoff values for a) the highest 10% of the weights? b) the lowest 20% of the weights? c) the middle 40% of the weights? a) The cutoff weight for the highest 10% of the steer weights is pounds. (Round to one decimal place as needed.) b) The cutoff weight for the lowest 20% of the steer weights is pounds. (Round to one decimal place as needed.) c) The cutoff for the middle 40% of the steer weights are and pounds. (Use ascending order. Round to one decimal place as needed.)