question: to begin your free file analysis, simply drag-and-drop your r3p file inside the dotted lines below, or click "browse my computer" and select your file.
Capitalize this past sentence correctly.
A: To begin your free file analysis, simply drag-and-drop your R3P file inside the dotted lines below, or click "Browse My Computer" and select your file.

question: he also posed a generalisation of the continuum hypothesis by asking if 2 to the power a was equal to a+1.
Capitalize this past sentence correctly.
A: He also posed a generalisation of the continuum hypothesis by asking if 2 to the power a was equal to a+1.

question: order within 8 hours 59 min.
Capitalize this past sentence correctly.
A: Order within 8 hours 59 min.