const a = 1; const b = 2; const c = 3;

     (function firstFunction () {
       const b = 5; const c = 6;

       (function secondFunction () {
         const b = 8;

         (function thirdFunction () {
           const a = 7; const c = 9;

           (function fourthFunction () {
             const a = 1; const c = 8
           })()
         })()
       })()
     })()

  Use your knowledge of the variables' scope and place the following code
  inside one of the functions in scope.js so the output is a: 1, b: 8, c: 6

     console.log(`a: ${a}, b: ${b}, c: ${c}`)