Tough Physics Question - Grade 12 - Kinematics/Forces/Energy all in one - Please show steps?

A bullet with a mass of 45 g is fired into a 8.3 kg block of wood resting on a floor against a spring (the coefficient of kinetic friction between the floor and the block is 0.24). This idea spring (k=76 N/m) has a maximum compression of 28 cm. What was the initial speed of the bullet?
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