diff --git a/index.js b/index.js
index 0f4b28b..d61df0f 100644
--- a/index.js
+++ b/index.js
@@ -1,17 +1,53 @@
 class SortedList {
-  constructor() {}
+  constructor() {
+    this.items =[];
+    this.length= 0;
+    
+  }
 
-  add(item) {}
+  add(item) {
+    this.items.push(item);
+    this.items.sort((a,b)=> a - b);
+    this.length = this.items.length;
+    
 
-  get(pos) {}
+  }
 
-  max() {}
+  get(pos) {
+    if (pos < 0 || pos>= this.length) {
+      throw new Error("OutOfBounds")
+    }
+    return this.items[pos];
+  }
 
-  min() {}
+  max() {
+    if(this.length === 0){
+      throw new Error('EmptySortedList');
+    }
+    return this.items[this.length -1 ];
+  }
 
-  sum() {}
+  min() {
+    if (this.length === 0){
+      throw new Error("EmptySortedList")
+    }
+    return this.items[0];
+  }
 
-  avg() {}
+  sum() {
+    if (this.length === 0){
+      return 0;//returns 0 if the list is empty
+    }
+    return this.items.reduce((acc, curr) => acc + curr, 0)//calculation of sum using reduce
+
+  }
+
+  avg() {
+    if(this.length === 0){
+      throw new Error('EmptySortedList');
+    }
+    return this.items.reduce((acc,curr) =>acc + curr ,0 )/this.length//claculation of the average
+  }
 }
 
 module.exports = SortedList;
diff --git a/index.txt b/index.txt
new file mode 100644
index 0000000..d22e874
--- /dev/null
+++ b/index.txt
@@ -0,0 +1,36 @@
+class SortedList {
+  constructor(arr) {
+    this.items =arr ;
+    this.length= 0;
+    this.number= null;
+  }
+
+  add(item) {
+    this.items.sort()
+    for(let i =0; i < this.items.length;i++){
+   
+      if(this.items[i] <= item){
+        this.number = this.items[i]
+      }
+    }
+    console.log(this.number)
+    let Nindex = this.items.indexOf(this.number)
+    this.items.splice(Nindex+1,0,item)
+
+  }
+
+  get(pos) {}
+
+  max() {}
+
+  min() {}
+
+  sum() {}
+
+  avg() {}
+}
+let alfie = new SortedList([9, 3, 5,2])
+alfie.add(0)
+console.log(alfie.items);
+
+// module.exports = SortedList;
diff --git a/package.json b/package.json
index 2940292..c952e46 100644
--- a/package.json
+++ b/package.json
@@ -12,5 +12,8 @@
     "intro"
   ],
   "author": "supoort@rootlearn.com",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "mocha": "^10.3.0"
+  }
 }