In class we solved the following example problem: The 0.5 lb pellet is pushed against the spring and released from rest at A. Neglecting friction, determine the smallest deflection of the spring for which the pellet will travel around the loop and always remain in contact with the loop. Now, solve the same problem to determine the smallest deflection of the spring required if the section AB has a length of 2 feet and has a coefficient of friction of 0.25 (the section BD is frictionless). (7.5 points)