Add video link

E04SumCalculator/.idea/deploymentTargetDropDown.xml

@@ -3,7 +3,20 @@
   <component name="deploymentTargetDropDown">
     <value>
       <entry key="app">
-        <State />
+        <State>
+          <runningDeviceTargetSelectedWithDropDown>
+            <Target>
+              <type value="RUNNING_DEVICE_TARGET" />
+              <deviceKey>
+                <Key>
+                  <type value="SERIAL_NUMBER" />
+                  <value value="kf5hy9pzzhq4fece" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </runningDeviceTargetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2023-11-27T13:19:36.735951762Z" />
+        </State>
       </entry>
     </value>
   </component>

E04SumCalculator/README.md

+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/cVrQ5wwOCjA?si=aCnfhDXenqp9jv-1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

README.md

@@ -5,8 +5,9 @@ Iftakhar Husan
 - [Exercise 1][ex1]
 - [Exercise 2][ex2]
 - [Exercise 3][ex3]
-
+- [Exercise 4][ex4]
 
 [ex1]: ./e01-first-application/
 [ex2]: ./e02-build-ui-with-layout-editor-1/
 [ex3]: ./E03BuildUIWithLayoutEditor2/
+[ex4]: ./E04SumCalculator/