This rule 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.  Using Visual Basic, 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.)  See the figure below.

Suggested Control Names and Attributes:

Name Property	Text Property	Control Type	Notes
frmRuleOf72	Rule of 72	Form	Holds Controls
btnEvaluate	Evaluate Rate	Button	Triggers event to display calculations
lstOutput		ListBox	Diplays calculations