Negia
Unfortunately the nun and yud are just touching. It's hard to tell from the photo but I don't think that its thin or light enough to be insignificant. Also, especially with a mem that often has a very small connection at the chartom.
Posts
mem rounded a bit
The first mem is a shayla of a samech, since it is rounded at the right corner. The second mem although rounded on both bottom corners, is kosher, since it definitly is a mem. The difference between the two is, that in the first the body of the mem is thin adding to the problem, as in the second the body is very wide obviouly saving it from looking as a samech. (This is my understanding of the hallacha, according SA Harav 32 ois mem, but the Mikdash Me'at has a different opinion, in regard to establishing the difference between a samech and a mem, and probably would passel the second mem here).
