Add spaces: WhenIleftthehotel,thelobbywascrammedwithyoungstersandtheirluggage,andnowtheywalkthecorridorstalkingnoisilyinsomeSlavictongue.

Answer: When I left the hotel, the lobby was crammed with youngsters and their luggage, and now they walk the corridors talking noisily in some Slavic tongue.

Add spaces: Thevertex(wheretheparabolaturnsround)liesontheaxisofsymmetrythereforeweknowthex-valueofthevertex(3).

Answer: The vertex (where the parabola turns round) lies on the axis of symmetry therefore we know the x-value of the vertex (3).

Add spaces: OtherReasons:CRCerrors,brokendownload,missingparitybit,recoverytoolerrorsareotherreasonsforZIPfilecorruption

Answer:
Other Reasons: CRC errors, broken download, missing parity bit, recovery tool errors are other reasons for ZIP file corruption