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Your best submission for each question part is used for your score. 1. [-/10 Points] DETAILS LARCALC11 2.6.015. MY NOTES ASK YOUR TEACH All edges of a cube are expanding at a rate of 7 centimeters per second. (a) How fast is the volume changing when each edge is 5 centimeter (s)? cm/sec (b) How fast is the volume changing when each edge is 11 centimeters? cm /sec Submit Answer 2. [-/10 Points] DETAILS LARCALC11 2.6.022 . MY NOTES ASK YOUR TEA A construction worker pulls a five-meter plank up the side of a building under construction by means of a rope tied to one end of the plank (see figure). Assume the opposite end of the plank follows a path perpendicular to the wall of the building and the worker pulls the rope at a rate of 0.30 meter per second. How fast is t of the plank sliding along the ground when it is 2.5 meters from the wall of the building? (Round your answer to two decimal places.) 5 m_ m/sec Submit Answer 3. [-/10 Points] DETAILS LARCALC11 2.6.005 . MY NOTES ASK YOUR T Assume that x and y are both differentiable functions of t and find the required values of dy/dt and dx/dt. xy = 8 (a) Find dy/dt, given x = 6 and dx/dt = 10. dyldt = (b) Find dx/ dt, given x = 1 and dyldt = -7. dx/ dt =