Can you find the slope of each of the lines?

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?