Need help with gr 12 momentum question. Need answer asap. Please make sure ur answer is brief and you use gr 12 concepts so that its easier for me to understand. Tnx (Need answer asap)

In the setup below there are two blocks. Block 2 has a mass 1.73 kg and is not moving on frictionless horizontal surface and is attched to a spring with constant 110 Mm, the other end of the spring is fixed to a wall. Block 1 with mass of 7.0 kg, is given an intial velocity of 5.4 m/s towards block 2. When block 1 and 2 collide there is a perfectly inelastic collision. What will be the maximum compression of the spring? (Use 3 = 'Ehtimfs2 and round answer to 1 decimal place)