Answer from cs61c-er (Chienyu CHIEN 17789156) for Question 1
Instructions and data format were meaningless to computer, because only thing we stored into computer were data.  And we encapsulate some header into a data frame. ,every time,when computer would like to access a data frame, it has to analyze the header first. then computer would know what kind of data is it. Maybe a instruction, maybe a data with specific format.

To make this happen, I think we should have a normal standard that widly use allover the world. Then processor could follow the standard, design to achieve data usage.