This is Boolean algebra, I have to find the Sum of the Product for this problem. I need to prove it with a K-Map. Some strange reason its not coming up right. Could somebody please look at this and point out the trouble either with my answer or K-Map.
Thanks

 

For starters C & C* = 0, not 1 as you seem to have assumed

 

When circling groups of terms on a K-map, the height and width of your box should always be a power of 2 (1, 2, 4 ...), so you shouldn't have any 1 x 3 boxes on your K-map.