Where the debug info of static library is merged after linking with MSVC?

Question

Let's say that I have static library which generates it's debug info in pdb format with /Zi option. Next let's link it into executable which also generates its debug info in pdb.

1. Am I right that the debug info of the static library will be merged into pdb of the executable?
2. If the library generates it's debug info directly in lib file with /Z7 option, but the executable still uses pdb where the debug info from the static library will be merged? Into the pdb file or directly in executable?