Update exercise instructions for Virtual WAN creation

Added estimated time for the exercise and clarified task instructions.

Author: staleycyn

Instructions/Exercises/M02-Unit 7 Create a Virtual WAN by using Azure Portal.md

@@ -19,15 +19,15 @@ In this exercise, you will create a Virtual WAN for Contoso.
 
 ![Diagram of virtual network WAN architecture.](../media/7-exercise-create-virtual-wan-by-using-azure-portal.png)
 
+## Estimated time: 65 minutes (including ~45 minutes deployment waiting time)
+
 ## Job skills
-In this exercise, you will:
 
+In this exercise, you:
 + Task 1: Create a Virtual WAN
 + Task 2: Create a hub by using Azure Portal
 + Task 3: Connect a VNet to the Virtual Hub
 
-## Estimated time: 65 minutes (including ~45 minutes deployment waiting time)
-
 ## Task 1: Create a Virtual WAN
 
 1. From a browser, navigate to the Azure portal and sign in with your Azure account.