Open Middle: Comparing and Identifying Fractions on a Number Line

Creation of this resource was inspired by an Open Middle exercise created by Kate Nowak, [url=https://twitter.com/bowenkerins]Bowen Kerins[/url], and [url=https://twitter.com/gfletchy]Graham Fletcher[/url].
Your task:
Select a number from each drop-down list below to create four fractions. Can you create four fractions that meet the criteria described above? Try to do so!
Try to create another setup that is ENTIRELY DIFFERENT from the one you created above.
For the two apps below this picture, read the directions carefully! They're a little different from the directions for the apps above. Yet this same problem still serves as context here.
Create another setup that meets the criteria described above. Yet this time, make fraction A as LOW AS YOU POSSIBLY CAN. What is this lowest possible value?
Create another setup that meets the criteria described above. Yet this time, make fraction D as HIGH AS YOU POSSIBLY CAN. What is this highest possible value?

Information: Open Middle: Comparing and Identifying Fractions on a Number Line