Shows a pendulum of length L = 1.9 m. Its bob (which effectively has all the m) has speed v0?

shows a pendulum of length L = 1.9 m. Its bob (which effectively has all the m) has speed v0 when the cord makes an angle θ0 = 39° with the vertical. (a) What is the speed of the bob when it is in its lowest position if v0 = 8.2 m/s? What is the least value that v0 can have if the pendulum is to swing down and then up (b) to a horizontal position, and (c) to a vertical position with the cord remaining straight?