Hello, I have problems with the following questions. Please help me solve them!

10. For each of the examples given, extract the network identifier and express it in dotted decimal notation. Take advantage of the shortcut described in step 9. When converting from binary to decimal or vice-versa, use the tables provided below. 208.73.211.230/25 208.73.211.230/23 1 28 64 32 16 8 4 2 1 Power of 2 Bit Cumulative Amount 128 64 32 16 8 4 2 1 Power of 2_ Bit Amount Remaining 12. For each of the examples given, extract the network identifier and express it in dotted decimal notation. Take advantage of the shortcuts described in step 9 and step 11. When converting from binary to decimal or vice-versa, use the tables provided below. 71.74.42.231/15 71.74.42.231/24 128 64 32 16 8 4 2 1 Power of 2 Bit Cumulative Amount 128 64 32 16 8 4 2 Power of 2 Bit Amount Remaining