Write C++ statements that accomplish each of the following: a. Declare and initialize int variables x to 25 and y to 18. b. Declare and initialize an int variable temp to 10 and a char variable ch to 'A'. c. Add 5 to the int variable x which already exists. d. Declare and initialize a double variable payRate to 12.50. e. Copy the value from an existing int variable firstNum into an existing int variable tempNum. f. Swap the contents of existing int variables x and y. (Declare any new variables you need.) g. Output the contents of existing double variables x and y, and also output the value of the expression x + 12 / y - 8. h. Copy the value of an existing double variable z into an existing int variable x.