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 |