hotfix: declara i

06-sum/index.js

@@ -1,8 +1,8 @@
 export function sum(values) {
   // implementar logica aqui
   let soma = 0;
-  for (i in numbers) {
-    soma += numbers[i];
+  for (i in values) {
+    soma += values[i];
   }
   return soma;
 }

07-sumEven/index.js

@@ -1,6 +1,7 @@
 export function sumEven(value) {
   // implementar logica aqui
   let soma = 0;
+  let i = 0;
   for (i in value) {
     if (value[i] % 2 != 0) {
       continue;