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7. A horizontal disk rotates about a vertical axis through its center Point P is midway between the center and the rim of the disk, and point Q is on the rim. If the disk turns with constant angular velocity, which of the following statements about it are true? 1) The linear acceleration of Q is twice as great as the linear acceleration of P. 11) The angular velocity of Q is twice as great as the angular velocity of P III) The centripetal acceleration of Q is twice as great is the angulat 'ncceleration of P. IV) Q is moving twice as fast as P A) Only II and IV B) Only I, II and IV C) Only I and IV D) Only III and IV E) Only I, III and IV