4 always seems to be a crap shoot... I try aim for (place the last dot of my power) about the 5th row of arrows from the ball (placed at the top right corner of the mat) and about the fourth arrow up from the bottom. This usually carries the ball down enough to catch the second slope and 2-bank the shot into the cup... usually : )
5 - Place the ball at the upper portion of the mat and alined with the right edge of the barricade. Place the third swing dot from the ball just to the left of the corner... 3 banks latter, hole in one.
6 is a little trickier... the best I can give you is aline the ball, top left corner of the mat, and place the third dot from the ball on the bottom wall and alined with the right wall of the hole's enclosure... swing away and 4 banks later, hole in one.
Thomas : )