A man of letters

(Make sentence with following phrase and idioms (with Bangla meaning))

Black and white ( লিখিতভাবে) = Inform your allegation to the higher authority in black and white.

With a view to (উদ্দেশ্যে; অভিপ্রায়ে) = Mili came to Manikgonj with a view to visiting a new place.

Slow coach (কাজকর্মে শ্লথগতি বা নির্বোধ বা যেকোন ধ্যান-ধারণা পোষণকারী অনগ্রসর লোক ) = A slow coach can not prosper in life.

Go to the dogs (গোল্লায় যাওয়া) = If a country or organization goes to the dogs, it becomes less successful and of worse quality than it was in the past.