The cost to mail a first-class letter within the United States is a functionof its weight. In 2014, the cost was $0.49 for the first ounce and $0.21 foreach additional ounce. Fractions of an ounce are ROUNDED UP to thenearest ounce. The cost of mailing a letter is described by the functionbelow. In the function, represents the weight of the letter, rounded up tothe nearest ounce. What is the cost of mailing a first-class letter thatweighs 4.2 ounces?f(w) = 0.49 +0.21(w - 1)