I see that you're asking for help with calculating logarithms. Let's go through the list step by step. Here are the logarithms that need to be calculated:

11. $\log 17$
12. $\log 4$
13. $\log 18.7$
14. $\log 25$
15. $\log 7.8$

I'll calculate each of these to three decimal places.

1. $\log 17 \approx 1.230$
2. $\log 4 \approx 0.602$
3. $\log 18.7 \approx 1.271$
4. $\log 25 \approx 1.398$
5. $\log 7.8 \approx 0.892$

Would you like to go through the process of calculating these, or do you have any other questions about logarithms?