Digital billboards embedded with software can identify passersby and then display ads targeted to them, based on their age, gender, and attention level.

Facial Recognition.

Explanation:

Digital billboards embedded with facial recognition software can identify passers by and then display ads targeted to them, based on their age, gender, and attention level. Digital boards with this customized features are very much effective and efficient in individual marketing. They start displaying the ads which are directly related to the customers passing by. They are that much intelligent that only display ads which are needed to be sown to their desired target market. These are the next level marketing where the amount spent by an organization is used very effectively. These billboards are becoming very popular now-a-days. They not only increase the brand awareness but also brand equity and sales as well.

b $274.07

step-by-step explanation:

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b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.