create two rotation matrices R$1$ and R$2$ using the symbolic math toolbox. show that the product of R$1*$R$2$ is closed under matrix multiplication. create a $2$d rotation matrix which represents a rotation of pi$/4$ with respect to a given frame $\{$A$\}.$ In the new frame $\{$B$\},$ you find that an object of interest point is located at P$^$B$\_2=[1,1].$ find the coordinates P$^$A$\_2$ of this object with respect to frame $\{$A$\}.$