How to Create robots.txt file & sitemap.xml file for seo; Export weebly website

How to Create robots txt file & sitemap xml file for seo; Export weebly website correctly!
I'm full time freelancer, check my website: http://www.tips-digital.com
Need help? Add me on Skype: lifehack3315
You can also hire Freelancers here: http://a.seoclerks.com/linkin/317623

Here is code example for robots.txt
Sitemap: http://www.hotels-scanner.us/sitemap.xml

User-agent: NerdyBot
Disallow: /

User-agent: *
Disallow: /ajax/
Disallow: /apps/

NOTE: do not forget to change hotels-scanner.us to your website link.
You can generate xml sitemap here : https://www.xml-sitemaps.com/