Please help.

A physicist's right eye is presbyopic (i.e., farsighted). This eye can see clearly only beyond a distance of 97 cm, which makes it difth for the physicist to read books and journals. Find the focal length and power of a lens that will correct this presbyopia for a reading distance of 25 cm, when worn 2 cm in front of the eye. Is this a converging or a diverging lens? 0 diverging O converging The 400-turn primary coil of a step-down transformer is connected to an AC line that is 120.0 V (rrns). The secondary coil is to supply 11.0 A (ms) at 8.10 V (rrns). Assuming no power loss in the transformer, what is the number of turns N8 in the secondary coil? What is the power P of the eye when Viewing an object 41.0 cm away? Assume the lens-to-retina distance is 2.00 cm, and express the answer in diopters