First, for the 4th, "Chevron Panels". It was a little tricky at first, but by the seventh repeat I was actually able to knit the pattern without looking at the instructions (once I could tell where to knit the knits and purl the purls on the WS, it was a lot easier). I tried this one in some Nature Spun wool (colour: bamboo).
For the 5th, the pattern was "Chevron Rib" (lots of chevrons going on). This one is nice because it's effectively reversible - it's nigh impossible to tell which is the right or wrong side if you're not in the know!
And the 6th was a diagonal basketweave, which I really liked. I found the written instructions hard to follow, so after a while I did a chart for it, and it was much easier - visually - to make sense of how the pattern works. I've included another lo-fi chart (on paper, photographed instead of scanned)... chart begins on the RS with row one. Dots are purls on the RS, knits on the WS, and, as I like to do, the rest of the stitches were coloured in magenta to make for easier reading. Enjoy!