Bacteria of species A and species B are kept in a single test
tube, where they are fed two nutrients. Each day the test tube is
supplied with 19,660 units of the first nutrient and 31,890 units
of the second nutrient. Each bacterium of species A requires 4
units of the first nutrient and 5 units of the second, and each
bacterium of species B requires 1 unit of the first nutrient and 6
units of the second. What populations of each species can coexist
in the test tube so that all the nutrients are consumed each
day?
a-
b-