Please help and show all work. Had another homework problem like this and got it wrong 3 times. Thank you!

13. [-/8.33 Points] DETAILS MY NOTES SERCP11 11.3.OP.026. ASK YOUR TEACHER PRACTICE ANOTHER A student performs an experiment using an aluminum container, with a mass of 0.150 kg, that contains 0.285 kg of water, all initially at 29.0C. The student then adds a sample of an unknown substance to the water. The sample has a mass of 1.5 kg and an initial temperature of 91.0C. After waiting until the entire system reaches thermal equilibrium, the student measures a final temperature of 32.0C. What is the specific heat (in ]/(kg . C)) of the unknown substance? You may assume the thermal energy transferred to the environment during the experiment is negligible. J / ( kg . oc )