diff --git a/store.ts b/store.ts
index 1745d61..35dfcda 100644
--- a/store.ts
+++ b/store.ts
@@ -79,43 +79,47 @@ const cart = [1, 3, 5];
 // ------------------------------------
 
 function getAvailableProducts(
-  store /* : add type here */
-) /* : add return types */ {
-  return [];
+  store : Store /* : add type here */
+) :  Product[] /* : add return types */ {
+  return store.products.filter((product => product.inStock));
 }
 
 function getProductsInPriceRange(
-  store /* : add type here */,
-  minPrice /* : add type here */,
-  maxPrice /* : add type here */
-) /* : add return types */ {
-  return [];
+  store : Store /* : add type here */,
+  minPrice: number /* : add type here */,
+  maxPrice: number /* : add type here */
+):Product[] /* : add return types */ {
+  return store.products.filter((product => 
+    product.price >= minPrice && product.price <= maxPrice));
 }
 
 function getProductsByTag(
-  store /* : add type here */,
-  tag /* : add type here */
-) /* : add return types */ {
-  return [];
+  store: Store /* : add type here */,
+  tag: string /* : add type here */
+): Product[] /* : add return types */ {
+   return store.products.filter((product => 
+    product.tags.includes(tag)));
 }
 
 function getAvailableProductsByTag(
-  store /* : add type here */,
-  tag /* : add type here */
-) /* : add return types */ {
-  return [];
+  store: Store /* : add type here */,
+  tag: string /* : add type here */
+) : Product[] /* : add return types */ {
+  return store.products.filter((product =>
+    product.inStock && product.tags.includes(tag))
+  );
 }
 
 function getCartProducts(
-  store /* : add type here */,
-  cart /* : add type here */
-) /* : add return types */ {
+  store: Store /* : add type here */,
+  cart: number[] /* : add type here */
+) :Product[]/* : add return types */ {
   return [];
 }
 
 function getCartTotalInStock(
-  store /* : add type here */,
-  cart /* : add type here */
-) /* : add return types */ {
+  store: Store /* : add type here */,
+  cart: number[] /* : add type here */
+) : number /* : add return types */ {
   return 0;
 }