You asked how to strum this. I thought someone would have answered by now but here goes anyway.
Each beat divides into three rather than the usual two. So instead of counting
for each bar you count
for each bar. To strum the basic pattern you strum down on the number, do nothing on the first + then strum up on the second +. Like this
Code:
D U D U D U
1 + + 2 + + 3 + +
You can see that the down strum lasts twice as long as the up strum. Once you get the feel for the rhythm you may well be able to figure out the syncopation yourself.