A letter with a prefix :)
I am Vadim Borisovich. I am in an impasse. I checked the lab. I noticed the mistakes and started counting. I found that Ve is less than Vs- because the maximum negative maneuver overload is -0.96. Consequently, the root is also less than one unit and by the formula reduces the speed. That is, the aircraft is not calculated for flights in a reversed position... and then how to show it on the chart? Do not take into account Vs- or make a performance there? And if you do a performance, how?

Prepaid: What is it?