Please capitalize where necessary: the variable a is a common factor.
A: The variable a is a common factor.

Please capitalize where necessary: reinforce cloned fragment by pcr using gapc5 'and gapc3' primers.
A: Reinforce cloned fragment by PCR using gapC5 'and gapC3' primers.

Please capitalize where necessary: rg/ksf 611-3 a-r wh space-saving letterbox on the free-standing communication column high gloss white 039632
A: RG/KSF 611-3 A-R WH Space-saving letterbox on the free-standing communication column High gloss white 039632

Please capitalize where necessary: there is also water for irrigation.
A:
There is also water for irrigation.