[Qt-interest] Some questions about LGPL licensing

[RFOG]

Hello all!

I'm evaluating to use QT in our Company but I have some questions
about LGPL version licensing that IMHO they are not clear enough. I'm
going to put them as simple questions.

Can I statically link a program with source code available? That is a
program that is not covered by any licence other than "do with it all
you want" but it comes with source code -and project files- compressed
in same ZIP file that cotains the executable. We offer this way our
demo sample programs to show how to use our devices with code.

Can I statically link a propietary program given as free? We offer
some other programs as free but without source code available,
basically they are programs that works with our devices to configure
or test them.

Can I statically link a propietary program to be sold and, of course,
no source code available or bein sold in any way? This is just for
curiosity.

Of course, with dynamic linking all the above questions are allowed,
but sometimes customers see the runtimes as an inconvenient.

Thanks in advance.