please show me step by step in python

Task 2 - Define a function called emphasise, which takes three arguments called header, message and width. header and message are both strings, and width is an int. width will have a default value of 50 , and heoder and message will both be optional - i.e., empty string as default value - The function should return a string which shows heoder and message in a box (see examples) - The outer width of the box should be based on the provided width. More specifically, it should be width +4. So, we will use the "=" character, (width +4 ) times, for the first and last lines of the box, as well as the line separating header and message (if applicable) header should be split up into multiple lines of exactly width characters, until all characters have been displayed. On each of these lines, start with a"==" and a space, then the characters of the string for that line, then another space and another "=" - On the last line (potentially the only line if header is shorter than width), insert extra spaces before the closing " =" ", if necessary - Words in the strings may get split up, this is okay - message should be added in the same way, except with extra padding lines above and below - Your function should produce the same strings as all the below examples - Your function should not print a string while running. It should simply create and retum it - header = "This is my header", message = "This is my message which I want to put in a box", width =20 : header = "This is my header", message = "This is my message which I want to put in a box", width = 10: ==mm===m=m==Thisismy==header====Thisismy==messagew==hichIwan==ttoput1==nabox= header = "This is my header", width =20 : message = "This is my message which I want to put in a box", widch =20