i want to modeling this example as a code in Matlab and i want to get a figure

Example: Idealized Power Curve with Rayleigh Statistics.

A wind turbine $(1000-$kW rated power, $54-$m$-$diameter rotor$)$ has a cut$-$in wind speed $V_C=4\frac{m}{s},$ rated wind speed $V_R=14\frac{m}{s},$ and a furling wind speed of $V_F=25\frac{m}{s}.$ If this machine is located in an area with an average speed of $10\frac{m}{s},$ find the following:

a$.$ How many $\frac{h}{y}r$ is the wind below the cut$-$in wind speed?

b$.$ How many h$/$yr will the turbine be shut down due to excessive winds?

c$.$ How many $kW\frac{h}{y}r$ will be generated when the machine is running at rated power?

Solution:

a$.$ The probability that the wind speed is below cut$-$in $4\frac{m}{s}$ is: