Explain the difference between undecidable problems and unreasonable time algorithms. Be specific.

"gps interaction and cognitive process" respond to the following: imagine that you have been asked to design a gps product that will have voice recognition and bluetooth capability. discuss and conceptualize a user interaction model. predict two (2) problems that may arise in gps products with voice recognition and bluetooth capability. recommend solutions for each of these issues. attention is one of the six cognition processes. when attention is applied to a design, the goal is to make it easier for the end user to quickly locate where he / she should type information on the computer or mobile device screen. compare and contrast how the google search engine and the microsoft bing search engine employ the attention cognition process. provide your opinion as to which search engine better employs the attention cognition process and explain why.

How do i comment on answers? there's one answer i'm confused about but i don't know how to comment on it

What are the two parts of a cell reference? a. column intersection and row rangeb. column range and row intersectionc. column letter and row numberd. column number and row letter