$4$

Suppose $x=2,y=6.$ Write a MATLAB code to compute the following expressions:

$a=(1-\frac{1}{x^5}{)}^{-1}$;$,b=\frac{3x}{2y}$;$,c=2\frac{sin(x)}{3x^2}$;$,d=7(x^{\frac{1}{3}})+y^{0\mathrm{.}58}$

$5$

Using "Van der Waals equation" of chlorine $(C{l}_2)$ :

$(P+\frac{n^{2}a}{V^2})(V-nb)=nRT$

Where:

$R=0\mathrm{.}08206L.at\frac{m}{K}.$mol;,$n=1$mol;,$V=22\mathrm{.}41L$;

$a=6\mathrm{.}49L^{2}at\frac{m}{m}o{l}^2$;$,b=0\mathrm{.}0562\frac{L}{m}ol$

Write a MATLAB code to calculate the following:

Calculate the temperature $T$ if $P=50$atm.

Calculate the pressure $P$ if $T=950K.$

N$.$B$.$ For $Q\mathrm{.}4$ and $Q\mathrm{.}5,$ use dairy function to save the command window session and display the results using the short format.