For the casement window mechanism shown, the gears have the following proper ties: 𝑑1=0.75 in.; 𝑁2=48 teeth and 𝑃𝑑=32;𝑁3=16 teeth and 𝑃𝑑=32;𝑑4=4 in. Starting at the configuration shown ), graphically determine (using either manual drawing techniques or CAD) the rotational speed with which the window opens when the crank rotates at a constant rate of 20𝑟𝑝𝑚.