What percentage of the area under the normal curve

(a) What percentage of the area under the normal curve lies to the left of ?? (b) What percentage of the area under the normal curve lies between ??? and ? + ?? (c) What percentage of the area under the normal curve lies between ?? 3? and ? + 3?? What percentage of the area under the normal curve lies as given below? (a) to the right of ? (b) between ? – 2? and ? + 2? (c) to the right of ? + 3? (Use 2 decimal places.)