Question $6$ of $12$

display the area of a triangular playground in square feet. It should also display the cost of covering the playground with artificial grass. $($F$10\mathrm{.}1-$F$10\mathrm{.}7,$ A$10\mathrm{.}3)$ for entering the price per square foot. This list box should display numbers from $1$ to $6$ in increments of $0\mathrm{.}5.$ constructor, a parameterized constructor, and a method to calculate and return the area of a triangle.

c$.$ Code the application. Save the solution and then start and test the application.