write a code in microsoft visual

NOTE text box will be labeled txtgrade$1,$txtgrade$2,...,$txtsolution,buttons will be named after what it labeled

Develop a single Windows Forms app to calculate and display the mean $($average$),$ standard deviation, maximum value, and

minimum value of $6$ data points $($Note: Grades are to be stored in an Array$).$ Based on the mean value, assign a letter grade using the

range of grades below:

Mean: $\stackrel{}{x}=\frac{{\displaystyle \underset{i=1}{\overset{n}{}}}{x}_n}{n}$

Variance: $,{}^2=\frac{{\displaystyle \underset{i=1}{\overset{n}{}}}(x-(\stackrel{}{x}){)}_n^2}{n-1}$

Standard Deviation: $,=\sqrt[\phantom{2}]{\frac{{\displaystyle \underset{i=1}{\overset{n}{}}}(x-(\stackrel{}{x}){)}_n^2}{n-1}}$

Grade Range:

Visual Basic Topics and Control Objects:

Windows Form, Variable and Data Types, Data Assignment, Conditional Statements, Error Handling, RadioButton Control Object,

Group Box Control Object, Textbox Control Object, Button Control Object, ToolTip Control Object, MsgBox$(),$ PictureBox Control

Object, Icon, Arrays