The timing diagram in Figure P6.7 illustrates a system in which ope rations occur as three consecutive clock cycles. Actions taking place in clock cycle 1 are scalable; that is, if the clock cycle time changes, the actions can be speeded up or slowed down correspondingly. In cycle 2, the action process 1 requires 25 ns and in clock cycle 3 the action process 2 requires 32 ns. If the clock cycle is less than the time required for process 1 or process 2, then one or more wait cycles have to be inserted for the process to complete. 

What is the time to complete an operation if the clock cycle time is 

a. 50 ns 

b. 40 ns 

c. 30 ns 

d. 20 ns 

e. 10 ns

FIGURE P6.7 Clock Cycle 1 Cycle 2 Process 1 25 ns Cycle 3 Process 2 32 ns Cengage Leaming 2014