Explanation
There are some ways you can automate the influx of data coming from offline sales.
The following options are currently available on Facebook's platform:
* Use a Point Of Sale provider to integrate offline conversions.
* Use digital receipts instead of printed receipts to enable offline conversions.
* Integrate your CRM system with your offline conversions.
* Collaborate with another Facebook Marketing Partner to measure offline conversions.

Explanation
For this exercise, you need the following aspects in order to segment your core/saved audience:
1. Age: you definitely want to set up age below 25 years old.
2. Mobile Device User: you need to specify Android as the primary operating system for mobile in order to target just Android users and exclude iOS users.
3. Location: you want to target the specific countries. In this case, Colombia and India in order to reach out to people in those two particular places.

You don't want to use App Store Region as an option to segment as they don't allow you to select specific countries. You are better off selecting countries and Mobile Device User to segment.

The gender and interest for this exercise are irrelevant since you don't have more info on what the mobile app is about.

Explanation
To make a video more effective for the mobile-feed environment you can:
* Shortened the video
* Change the aspect ratio to square to increase visibility in the feed environment
* Add text to convey the message without sound
* Move the initial brand mention earlier
Other best video practices:
* Capture attention quickly. Using colors, themes and imagery that evoke your brand at the start of your video can help people connect the ad to your brand quickly. Consider starting your video with lifestyle and product shots, recognizable spokespeople, action scenes or a vivid background to spark interest.
* Design for sound off. Since most video ads in mobile feed are viewed without sound, it's important to convey your message visually. Showing captions, logos and products can help communicate your message, even in silence.
* Frame your visual story. Producing video for a small screen requires consideration of dimension and scale. Play with zoom, crop and overall visual composition to make sure your story is told well on a small screen.
* Play more. There's no universal solution to building brands or driving actions with mobile video, so keep experimenting, testing and iterating to learn what works for your brand and audience.