Using Visual Basic, write a program containing a for…next loop. Cobalt-60, a radioactive form of cobalt used in cancer therapy, decays over a period of time. Each year, 12% of the amount present at the beginning of the year will have decayed. If a container of cobalt-60 initially contains 10 grams, determine the amount remaining after five years. See the figure below.

Suggested Control Names and Attributes( without container ):

Name Property	Text Property	Control Type	Notes
frmRadioactive	Radioactivity	Form	Holds Controls
btnAnalyze	Analyze Radioactive Decay	Button	Triggers event to display analysis of decay
txtAmount		TextBox	Displays amount of radioactivity.  Read only set to true.