= 29; 3 const alfred = 70; 4 5 const sumAges = (batman, joker, alfred) => { 6 return batman + joker + alfred; 7 }; 8 9 const partial = (fn, ...args) => { 10 return fn.bind(null, ...args); 11 }; 12 13 const partialSum = partial(sumAges, batman, joker) 14 15 console.log(partialSum(alfred)); // 139