You are developing a Windows Store app. A page in the app contains the following HTML code: The app must style a container element and two child elements to resemble the following image. The grid…

You are developing a Windows Store app. A page in the app contains the following HTML code:

The app must style a container element and two child elements to resemble the following image. The grid layout must meet the following requirements:

• The Top section must be half the width of the Bottom section.
• The solution must retain the proportions of the child sections in the

event that the dimensions of any of the grid sections change. You need to ensure that the proportions of the sections of the image are retained. Which CSS segment should you add to your style sheet?