MaidenformWomen's Specialty - Strapless Bandeau Top (pack of 1)

How many straps are included?

can this be used with a bra that doesn't have removable straps?

The picture shows the bra straps being pulled closer together than I want. Are these adjustable so you only pull them together enough to keep them up?

How can you put them on if you cannot reach your back to hook them on??