I have a question about how to graph these indifference set and lower & upper contour set. Can you help me to solve the first one?

2 Utility functions For each of the following utility functions over X = {1! E R : a: 2 }, graphically depict each of the following sets on a number line: 1. U[:1:) = s a The indifference set around a: = 1 I The lower contour set of :1: = 5 2. U(a:) = (35? a The indifference set around a: = 2 I The upper contour set of a: = 4 3. Uh") = min{:ra,64} o The lower contour set of :1: = 5 o The indifference set around :1: = 4 4. U[:r) = logmx ifs: <: and u otherwise the upper contour set of a:="15" o lower>