Assignment:
Let X:={a,b,c} be a set of three elements. A certain topology of X contains (among others) the sets {a}, {b}, and {c}. List all open sets in the topology T.
Let X’:={a,b,c,d,e} be a set of five elements. A certain topology T’ on X’ contains (among others) the sets {a,b,c}, {c,d} and {e}. List any other open set in T’ which you know must be there. Also name one subset of X’ which may or may not be open.
Provide complete and step by step solution for the question and show calculations and use formulas.