A Momentum-collision problem two dimensions (HELP)

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Homework Statement

An m = 6.20-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2660 N for 0.110 s. One piece of mass m1 = 2.20 kg travels backward at a velocity of 10.5 m/s and an angle of = 32.0° above the horizontal. A second piece of mass m2 = 1.20 kg travels at a velocity of 8.80 m/s and an angle of 28.0° below the horizontal.
a) What is the velocity of the third piece?
b) What is the direction of the third piece?

Homework Equations

P1i + P2i = P1f + P2f
I=Ft

The Attempt at a Solution

 

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the figure is here http://www.fizikodev.itu.edu.tr/res/mcgrawhill/BauerWestfall/1stEdition/Chapter07/P034figure.png