done

index.js

@@ -1,15 +1,48 @@
 class SortedList {
-  constructor() {}
+  constructor() {
+    this.length = 0;
+    this.items = [];
+  }
 
-  add(item) {}
+  add(item) {
+    this.length++;
+    this.items.push(item);
+    this.items.sort((a,b) => a - b);
+  }
 
-  get(pos) {}
+  get(pos) {
+    if(pos < 0 || pos >= this.length ){
+      throw new Error("OutOfBounds");
+    }
+    return this.items[pos];
+  }
 
-  max() {}
+  max() {
+    if( this.items >= 0 ){
+      throw new Error("EmptySortedList");
+    }
+    return this.items [this.length - 1];
+  }
 
-  min() {}
+  min() {
+    if( this.items >= 0 ){
+      return new Exception("EmptySortedList");
+    }
+    return this.items [0];
+  }
 
-  sum() {}
+  sum() {
+    if (this.length === 0) {
+    return 0;
+  }
+
+    let total = 0;
+    for (let i = 0; i < this.length; i++) {
+    total += this.items[i];
+  }
+
+    return total;
+  }
 
   avg() {}
 }