2 questions about Syntax in English. Answer all of them

For example, one of the questions is 2. The following sentence of English is ambiguous:

Matilda phoned her colleague from Germany.

Paraphrase the sentence above in four ways, to highlight its two possible interpretations (note each paraphrase you give should be unambiguous on its own).
Draw four phrase structure trees for the original sentence, each of which unambiguously conveys one of the two interpretations you identified for part a. Be sure to make clear which tree corresponds to which interpretation.