Question $1(3$ parts $a,b,c$ :

An airplane with a wingspan of $8$ ft and a wing area of $10f{t}^2$ has been tested in a wind tunnel and the following results were obtained at operating condition $1$: $C_{DP}=0\mathrm{.}020$ and $\frac{L}{D_{\text{m}\text{a}\text{x}}}=15.$ You may assume changes in drag due to Reynolds number effects are minimal.

a$.$ the incompressible drag coefficient of this airplane follows the form $C_D=C_{DP}+K{C}_L^2,$ what is $K?$

b$.$ conditions are now such that the airplane is operating the minimum power required. Given the drag coefficient equation from part a$,$ what would the L$/$D be in this case?

C$.(2$ points$)$ In steady level flight, how would the velocity needed to maintain the operating condition in part b compare to the velocity obtained at operating condition $1?($is it greater than, less than, or unchangel? explain; you don't have to calculate anything$)$