Anyone expert in HTML or Java ? PLS need help with href and some doubts in variable

I'm in 10th grade rn...

My Instã I'd is

hero2623F or Zoom if needed.
HELP MEEE​

The “rule of 72” is used to approximate the time required for prices to double due to inflation. if the inflation rate is r%, then the rule of 72 estimates that prices will double in 72/r years. for instance, at an inflation rate of 6%, prices double in about 72/6 or 12 years. write a program to test the accuracy of this rule. for each interest rate from 1% to 20%, the program should display the rounded value of 72/r and the actual number of years required for prices to double at an r% inflation rate. (assume prices increase at the end of each year.)

If a client wants to make minor edits, what should he/she use?

In which part of a professional email should you try to be brief, but highly descriptive?