You Are Given the Rate of Rotation of a Wheel $$520$$

You are given the rate of rotation of a wheel as well as its radius. Determine the following: (a) the angular speed, in units of radians/sec; (b) the linear speed, in units of cm/sec, of a point on the circumference of the wheel; (c) and the linear speed, in cm/sec, of a point halfway between the center of the wheel and the circumference. $$520$$ rpm; $r = 45$ cm

A) (a) 156 $\pi$ radian/sec,
(b) 780 $\pi$ cm/sec,
(c) 390 $\pi$ cm/sec
B) (a) $166 ~\pi ~\mathrm { radian } / \mathrm { sec }$
(b) 1,278 $\pi$ cm/sec,
(c) 400 $\pi$ cm/sec
C) (a) $\frac { 52 \pi } { 11 }$ radian/sec,
(b) 1,248 $\pi$ cm/sec,
(c) 624 $\pi$ cm/sec
D) (a) 520 $\pi$ radian/sec,
(b) 780 $\pi$ cm/sec,
(c) 1,560 $\pi$ cm/sec
E) (a) $\frac { 52 \pi } { 3 }$ radian/sec,
(b) 780 $\pi$ cm/sec,
(c) 390 $\pi$ cm/sec