A syringe with a plunger of diameter 2 cm is attached to a hypodermic needle with a diameter of 2.4 mm. What minimum force (in N) must be applied to

A syringe with a plunger of diameter 2 cm is attached to a hypodermic needle with a diameter of 2.4 mm. What minimum force (in N) must be applied to the plunger to inject into a vein where the pressure is 18 torr above atmospheric pressure.