What does a storefront extension package contain?

The following code from a sample gateway.json file shows the configuration for a web checkout payment gateway extension without the transaction types filled in:

What three of the valid transaction types for thegenericpayment method are needed for web checkout using redirect? (Choose three.)

A company has two sites. Site A is the default site and has English as the default language and German as an additional language. Site B has German as the default language. The company needs to provide metadata in both languages.
After creating the products in English, which action can the company take to have metadata in both German and English?

You need to display a message to a logged in shopper about a relevant promotion, based on the number of products in thecart and the total value of the items. You develop a custom widget that uses the User, Cart and Site view models as displayed in this example Javascipt:

Under what condition is theshowCartMsg()function true?

When working with the agent REST APIs, the site context is important. What are two ways the sitecontext can be set? (Choose two.)