Help me with ths please im in an examm

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.