What Pressure Will Be Measured (In Pa) If a Gas $\pi$

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², and 1 Pa = 1 N/m².

A) 3.183 * 10⁴ Pa
B) 1.273 * 10⁵ Pa
C) 1.273 * 10³ Pa
D) 3.183 * 10^-2 Pa
E) 1.273 * 10^-2 Pa