During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.86 km/s at an initial inclination of 52.2◦ to the horizontal. The acceleration of gravity is 9.8 m/s^2.
a. How far away did the shell hit? Answer in units of km.
b. How long was it in the air? Answer in units of s.