What step of execution in the y86 seq processor reads an instruction from memory and calculates the address of the next sequential instruction?

select one:

a. write back

b. pc update

c. fetch

d. execute

e. decode

f. memory

answer:

f

explanation:

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.