diff --git a/index.js b/index.js
index fccc9e603..922f2785b 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,27 @@
-// Write your solution in this file!
+const employee = {
+  name: 'Yuriy',
+  streetAddress: 'None of your business'
+};
+
+const updateEmployeeWithKeyAndValue = (employee, key, value) => {
+  return {
+    ...employee,
+    [key]: value
+  };
+}
+
+const destructivelyUpdateEmployeeWithKeyAndValue = (employee, key, value) => {
+  employee[key] = value;
+  return employee;
+}
+
+const deleteFromEmployeeByKey = (employee, key) => {
+  const newEmployee = {...employee};
+  delete newEmployee[key];
+  return newEmployee;
+}
+
+const destructivelyDeleteFromEmployeeByKey = (employee, key) => {
+  delete employee[key];
+  return employee;
+}