i think there are something wrong with the example:
the 6th computer:
it's ip address should be 195.38.54.65, but not 195.38.54.94.

Actually it could not have 195.38.54.65 because same address assigned to 5'th computer. But they both belongs to the same subnet: 65 & 224 == 94 & 224 == 64

I'm sorry. I just made a stupid mistake: I use 195038054094&255255255224 directly,so I get a wrong answer.
 thank you for help!