To make grey paint, you need to mix ○ 2 cans of black paint ○ 3 cans of white paint If you have 5 cans of black paint, how many cans of white paint do you need to make the grey paint? I NEED HELP ASA

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).