Convert a CMYK pdf to a RGB pdf and PDF page manipulation

Q: I have some questions:

A:

Is it possible to convert a cmyk pdf to a rgb pdf with PDFNetSDK?

Could you give me an code example which we convert cmyk to rgb pdfs?

B:

Is it possible to trim the size of the PDF with PDFNetSDK?

Could we change the PDF page boxes?

(MediaBox, CropBox, BleedBox, TrimBox & ArtBox)