Please capitalize where necessary: architect david a. stubbs ii has had more than 20 years’ experience in planning and designing learning environments.
A: Architect David A. Stubbs II has had more than 20 years’ experience in planning and designing learning environments.

Please capitalize where necessary: you find pages listed on the left and the information that the selected page offers on the right.
A: You find pages listed on the left and the information that the selected page offers on the right.

Please capitalize where necessary: he does not know why.
A: He does not know why.

Please capitalize where necessary: es_es (spanish, as spoken in spain)
A:
es_ES (Spanish, as spoken in Spain)