$6\mathrm{.}3.$ Consider an airplane patterned after the Fairchild Republic A$-10,$ a twin$-$jet attack aircraft. The airplane has the following characteristics: wing area $=47m2,$ aspect ratio $=6\mathrm{.}5,$ Oswald efficiency factor $=0\mathrm{.}87,$ weight $=103,047N,$ and zero$-$lift drag coefficient $=0\mathrm{.}032.$ The airplane is equipped with two jet engines with $40,298N$ of static thrust each at sea level.

a$.$ Calculate and plot the power$-$required curve at sea level.

b$.$ Calculate the maximum velocity at sea level.

c$.$ Calculate and plot the power$-$required curve at $5-km$ altitude.

d$.$ Calculate the maximum velocity at $5-km$ altitude.

Use MATLAB to fully solve and plot the required curves for problem $6\mathrm{.}3.$ You must submit both your code and your written answers $($do not just display the code used to obtain the answer$-$you need to clearly write down your answers$)$ to receive full credi. Note solve it using Matlab and indicate the code please and from the code and the thing you got from MATLAB solve the following problem.