Here is the XPath for above both checkboxes.
Xpath 1. Sign up for our newsletter!
//*[@id="newsletter"]
or use below one
/html/body/div/div[2]/div/div[3]/div/div/form/div[1]/div[7]/label
Xpath 2. Receive special offers from our partners!
//*[@id="optin"]
or use below one
/html/body/div/div[2]/div/div[3]/div/div/form/div[1]/div[8]/label
I hope it is helpful to you.