(General math) Write an assignment statement to calculate the area of a circle. The formula for determine the area, a, of a circle is a = pi r2, where r is the radius and pi = 3.1416. (Conversion) Write an assignment statement to convert temperature in degrees Fahrenheit to degrees Celsius. The formula for this conversion is Celsius = 5/9 (Fahrenheit - 32). (Debug) Determine the errors in the following statements and rewrite the statements to make it correct: a. cout > cout: d. cout