the ultimate shear strength of steel is taken to be 2.80 109 Pa, what force is required to punch through a steel plate 1.60 cm thick?

the ultimate shear strength of steel is taken to be 2.80 109 Pa, what force is required to punch through a steel plate 1.60 cm thick? Assume the superhero’s fist has cross-sectional area of 9.00 101 cm2 and is approximately circular.