Determine the velocity pressure coefficient, Kh$,$ for the external wind pressure on the roof of the rigid$-$gabled frame of an apartment building shown below. The building is located in the Los Angeles area of California, where the terrain is representative of exposure B$.$ The wind direction is normal to the ridge as shown.

a$.0\mathrm{.}80$

b$.0\mathrm{.}76$

c$.1\mathrm{.}26$

d$.0\mathrm{.}83$