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Fundamentals of university computer. Help me see if the calculation is correct. If it is wrong, please give the correction process and answer.
Here are the answers:

1, the first one is empty, the second one is wrong, and the correct one is 252. (101010 every three from the right are converted into a number; 000 is 0- 1 1 1 is 8)

2. The first one is correct and the second one is correct.

3. The first one is wrong (135 changed from octal to decimal: 1 * 8 2+3 * 8 1+5 = 93), and the second one is correct.

4. The first error (5a = 0101065438 hexadecimal = 001165438 octal = 132)

5. That's right

6. That's right