<|im_start|>system
Please reason step by step, and put your final answer within \boxed{}.<|im_end|>
<|im_start|>user
Given the following crystal representation:
4.9 4.9 2.8
90 90 111
Mg
0.00 0.00 0.00
Ag
0.75 0.00 0.00
Ir
0.37 0.97 0.40
Ir
0.37 0.03 0.40
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.9 4.9 2.8
90 90 111
Mg
0.00 0.00 0.00
Ag
0.75 0.00 0.00
Ir
0.37 0.97 0.40
Ir
0.37 0.03 0.40
Identify the crystal system.