Pls answer all and show work

13. A real, inverted image measures 32 cm when the object measures 8.0 cm. The lens' magnification is a) 4.0 b ) 4.0 cm C) 0.25 d) -0.25 - 4.0 cm 14. Light of energy 6.33 eV strikes a surface with work function 4.72 eV. Electrons ejected from that surface will have maximum kinetic energy equal to a) 11.05 eV b) 1.61 J C) 11.05 J d) 1.61 eV 15. The range of visible light for human beings is approximately: a) 400 m to 700 m b) 4 mm to 7 mm c) 400 mm to 700 mm d) 400 nm to 700 nm