Task 'A' run on a CPU. The task starts by running for 6 ms. 'A' waits for 4 ms while the operating system runs some instructions to access memory. The CPU is then idle for 1 ms while waiting for the memory read to complete. Finally, the task 'A' runs another 25 ms and completes. What is the CPU performance in ms?

Computer A requires 10 seconds to compress a file. Computer B requires 5 seconds. How many times faster is B than A at compressing a file?

Computer A requires 10 seconds to compress a file. Computer B requires 5 seconds. What is the performance of A?