7. The following LC-3 instructions execute starting from the point shown by the comment. 0000 0000 0000 0110 ; this is the content of address D 0000 0000 0000 0011 ; this is the content of address D +1 ; start LC-3 execution here 0010 101 111111110 0010 110 111111100 0101 111 111 1 00000 0001 111 111 0 00 101 0001 110 110 1 11111 0000 001 111111101 1110 100 111110111 0111 111 100 000001 ; end LC-3 execution here After the code reaches the end of the code (the last comment), what bits are held in R4? And in R5? And in R6? And in R7? And in memory address D? And in memory address D + 1? If you cannot know the bits held, explain why.