The vertical displacement y (in cm) of the end of an industrial robot arm for each cycle is y = 2t'- - tan 0.2t, where t is the time (in s). Find its vertical velocity for t = 12s. . . . . . Its vertical velocity for t = 12s is |cm/s. (Round to the nearest tenth as needed.)For a certain electric circuit, the current (in A) is given by i = 2.34 e ' 61-\" sin 196t, where t is the time (in 3). Find the expression for %. di _ dt (Round to one decimal place as needed.)