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Physics Ball Thrown and Conservation of Energy Help?

I need assistance in figuring out this problem: A 0.40 kg ball is thrown with a speed of 12 m/s at an angle of 33 degrees. a)What is its speed at its highest point? and b) how high does it go? (Use conservation of energy, and ignore air resistance.)

(For part a) I’m guessing that the conservation of energy equation doesn’t apply because there is no vertical velocity and only horizontal velocity, which would be 12 * cos 33 degrees)

Thanks!