12 заданий дискретной математики

Unfortunately, Oksana has delayed the work. I worked with her before, everything was fine, I planned to work together and further, but little that she did not perform the project, she doesn’t get in touch, she just ignores my messages. This is the third or fourth such case in her portfolio, they are identical, they just don’t get in touch! Dear Oxana, not to perform the project is possible (there are any cases, I think this is normal), just tell the customer, many have deadlines burned, we all want to be able to find a new executive!
I advise future customers (as well as myself) to immediately talk about this moment with any (and even more with this executive) that if something goes wrong, in advance and without negative consequences inform the customer of the impossibility or complexity with the project!