Link 2 of the mechanism shown rotates about the z-axis w.r.t. the ground (Link 1) at +2rad/s with an ang. accel. of ~4rad/sh2. Link 3 rotates about a pin joint currently aligned with the y-axis at -3rad/s with an ang. accel. of +2rad/sn2. What is the angular acceleration of the link? Angular acceleration [rad/5Q): type your answer... i+ typeyour answer... j+ -4 k. Answer with integers (include zeros). Include a minus sign if necessary. Don't include a plus sign. i r .\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\