pls help with this question i only have 25 mins, i dont need the explanation just the answer

thank you

QUESTION 9 A normal person has a near point at 25 cm and a far point at infinity. Suppose a nearsighted person has a far point at 169 cm. What power lenses would you prescribe? Answer in diopters, rounded to two decimal places. (In class I said that normally, glasses are made in 1/4-diopter increments. Ignore that restriction here.)