If you want an automatic testing framework like pytest to work with your code, what should you prefix test functions with (five characters)

Alook-up table used to convert pixel values to output values on a monitor. essentially, all pixels with a value of 190 or above are shown as white (i.e. 255), and all values with a value of 63 or less are shown as black (i.e. 0). in between the pixels are scaled so that a pixel with a value p is converted to a pixel of value 2/127 −+3969). if a pixel has a value of 170 originally, what value will be used to display the pixel on the monitor? if a value of 110 is used to display the pixel on the monitor, what was the original value of the pixel?

Awell-diversified portfolio needs about 20-25 stocks from different categories.

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables