User-agent: Mediapartners-Google*
Disallow:

User-Agent: Googlebot
Disallow: /logs/
Disallow: /_derived/
Disallow: /_etc/
Disallow: /_notes/
Disallow: /_private/
Disallow: /_vti_cnf/
Disallow: /_vti_pvt/

User-agent: Adsbot-Google
Allow: /

User-agent: Googlebot-Image
Allow: /

User-agent: Googlebot-Mobile
Allow: /

User-agent: * 
Disallow: /_etc/

User-agent: * 
Crawl-delay: 5