what power of spectacle lens is needed to allow a farsighted person, whose near point is 1.50 m, to see objects clearly that is 25.0 cm away?

what power of spectacle lens is needed to allow a farsighted person, whose near point is 1.50 m, to see objects clearly that is 25.0 cm away? assume the spectacle (corrective ) lens is held 1.50cm away from the eye by the eyeglass frames