Your grandmother used to play piano at her church for many years. lately, she has had some difficulty when she plays. she is having difficulty with what type of memory?

I believe that she may be experiencing problems with her implicit memory. by definition, implicit memory is the major form of long term memory that does not require conscious thought. it allows you to do things by rote (mechanical or habitual repetition of something to be learned) 

This is true. yes. indeed.