duplicated solutions in loops to match themes

lectures/lec5/p1/task6.js

@@ -1,3 +1,11 @@
 function sum() {
     return arguments.reduce((total, num) => total + num, 0);
 }
+
+function sum() {
+    let total = 0;
+    for (let i = 0; i < arguments.length; i++) {
+        total += arguments[i];
+    }
+    return total;
+}