Design an event handler that will execute when the calcAvailableCreditButton component is clicked. The event handler should perform the following:

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Declare the following Real variables: maxCredit, usedCredit, and availableCredit. Get a value from a text box named maxCreditTextBox and assign it to the maxCredit variable. Get a value from a text box named usedCredit TextBox and assign it to the usedCredit variable. Subtract the value in usedCredit from maxCredit and assign the result to availableCredit. Store the value in the availableCredit variable in a label component named available Credit Label.