(30 points) Write a Python Statements that accomplish the following (Please add Docstring and properly comments. You can review the case study from Lecture2-python.pdf.): 1. Declares int variable x and y. 2. Initializes an int variable x to 10 and char variable ch to 'B '. 3. Replaces the value of an int x to be 20. 4. Sets the value of a double variable z to be 25.3 5. Copies the contents of an int variable y into an int variable z. 6. Swaps the contents of the int variable x and y. 7. Outputs the content of a variable x and an expression 2*x+5-y where x and y double variables.