I need help with the following math exercises

- Which is greater than -4? (a) 5 (b) -5 (c) -11/2 (d) -25

2. Which is the smallest? (a) -1 (b) -1/2 (c) 0 (d) 3

3. Combine terms: 12a + 26b - (4b + 16a)

Please show calculations

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