A continuous tube with square cross$-$section is to be produced by plastic extrusion process; the die opening has the dimensions shown in the figure below. The extruder barrel has a diameter of $120$ mm and a length of $2\mathrm{.}8$ m$.$ The screw channel depth$=8\mathrm{.}0$ mm$,$ and its pitch $=92$ mm$.$ The viscosity of the polymer melt is $100$ Pa$-$s$,$ and the head pressure in the barrel is $3\mathrm{.}8$ MPa. The die swell ratio for the polymer used in the process is $1\mathrm{.}25.$ Calculate the rotational speed of the screw to achieve a production rate equal to the first$-$right two digits of your student number in units of cm$/$s of this tube? $2$ cm $1\mathrm{.}3$ cm