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At what initial speed must the basketball player in the figure throw the ball, at angle...

At what initial speed must the basketball player in the figure throw the ball, at angle θ0 = 50° above the horizontal, to make the foul shot? The horizontal distances are d1 = 0.9 ft and d2 = 12 ft, and the heights are h1 = 7.7 ft and h2 = 10 ft.

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