Isotopes Chemistry Question, Helpp?

Element Fictionium (Fc) has three isotopes. The first, Fc-113 has a m of 113.2972 amu and makes up 16.12% of a standard sample. The second isotope, Fc-115 has a m of 114.6571 amu and makes up 60.00% of a standard sample. The third isotope, Fc-116 has a m of 116.0259 amu and makes up the remainder of a standard sample. What is the average atomic m of this element?