$2.$ Write a user$-$defined MATLAB function for the following math function: r$(0)=3$ sin $(3$ cos $(0\mathrm{.}50))$ The input to the function is e in radians$)$ and the output is r$.$ Write the function such that can be a vector. $($a$)$ U UP$14$ se the function to calculate $(1/6)$ and r$(5$rt$/6).($b$)$ Use the function to plot $($polar plot$)($O$)$ for O