Complete the sentences with the correct relative pronouns - who, whose,

Complete the sentences with the correct relative pronouns - who, whose, which, when or where.
1) Mr. Jackson, . . . is our manager, owns a collection of ancient coins.
2)American continent, . . . was discovered in 1492, became home for many nationalities.
3) The willage . . . they went to have rest last summer is very picturesque.
4) My grandparents moved here in the years . . . the WWII began.
5) My friend . . . father owns a factory studies abroad.
6) The office . . . l work is in the city centre.