I need to program 6 & 7 with C++ thank you in advance!

6. Next, find the maximum/minimum point of the quadratic expression. The formula is: again, use this format to display the result with both x and y inside the parenthesis and separated by a comma. Each number shows 2 fractional digits as above. 7. Say goodbye to the user using his/her full name now. Something like (be creative): Thank you John Smith for using this program. Goodbye