Determine the velocity pressure coefficient, $K_h,$ for the external wind pressure on the roof of the rigid$-$gabled frame of building for an essential disaster operation center shown below. The building is located in Kansas City, Missouri, where the terrain is representative exposure C $,$ and the basic wind speed for risk category IV buildings is $120$ mph $.$ The wind direction is normal to the ridge as shown.

$$ a$.1\mathrm{.}31$

b$.1\mathrm{.}35$

c$.1\mathrm{.}02$

d$.1\mathrm{.}04$