Please capitalize where necessary: guide tube: din 2391 chrome-plated steel scr.
A: Guide tube: DIN 2391 Chrome-plated steel SCR.

Please capitalize where necessary: friday 09 february, 2018 61810798 requests since tuesday 16 december, 2003
A: Friday 09 February, 2018 61810798 requests since Tuesday 16 December, 2003

Please capitalize where necessary: 9 rejoice, o young man, in thy youth; and let thy heart cheer thee in the days of thy youth, and walk in the ways of thine heart, and in the sight of thine eyes: but know thou, that for all these things god will bring thee into judgment.
A: 9 Rejoice, O young man, in thy youth; and let thy heart cheer thee in the days of thy youth, and walk in the ways of thine heart, and in the sight of thine eyes: but know thou, that for all these things God will bring thee into judgment.

Please capitalize where necessary: a study of the fish population size and composition is a crucial element in our assessment of the watercourse.
A:
A study of the fish population size and composition is a crucial element in our assessment of the watercourse.