Sounds like homework...
Any google search would answer these, though I'm not sure the three things that happen when you switch a Red camera from 4KHD to 2KHD -- obviously it crops the sensor down, which means the field of view of the lens gets narrowed, and the data per frame drops unless you change the compression rate, plus you have the option of higher frame rates, but whether that's two or three or four things, I don't know, and if it's two, then I don't know what the third is.
Opening up from f/11 to f/2 is five stops, so either you have to add an ND1.5 filter in front... or change the ISO from 320 to 10, which would probably be a bad idea.... or you change the frame rate from 24 fps to 768 fps, however that loses 5-stops but it's because the shutter time has changed, so that doesn't count.
As for the difference between f/2.5 and f/3.2, I know there is a mathematical way of figuring out exactly the exposure difference, but since f/2.5 is a little under f/2.8 and f/3.2 is a little over f/2.8, I'm going to guess and say that this is a one-stop difference that you have to compensate for, so either you find a way of compensating on the camera, maybe by doubling the ISO value, or maybe doubling the wattage of the lamp, use a 650w instead of a 300w lamp, would work, or moving the book light rig closer to the subject or maybe just eliminating the silk and just using the bounce, etc. Or add a second 300w lamp to the book light rig.