The robotic arm from the previous problem is in the configuration shown below. Assume that theta is currently $30$ degrees and that point C currently lies along the x axis. If we want the end effector at C to travel $1$ ft$/$s in the negative x direction, what should the angular velocities be at joints A and B$?$ You must use a relative motion analysis, but can choose vector or scalar. $($Looking for answer in terms of Theta dot and Sigma dot