连接3个字符串并返回指向新字符串C的指针

I am wondering if anyone could help me, I am trying to concatenate 3 strings and return a pointer to the new string. I can't seem to figure out how to do this using strncat instead of strcat and strncpy instead of strcpy. I am only learning c, so any help wil. be greatly aprecaited.I am wondering if anyone could help me, I am tr