The answer is b. Susan has an appointment with he co-worker on the first Monday of every month. This scenario would benefit from being set up as a recurring appointment, since it requires the same thing to be done every month on the same day. Susan is likely to forget this appointment every month, so a reminder like this would be useful for her. For the other cases, a recurring appointment would not be of much benefit since they do not follow a particular pattern time-wise.
I found that,
On the basis of Model, computer is classified as: XT Computer (Extra Technology): It cannot support GUI based operating system. Its processing speed is 4.77 MHz and Intel 8080, 8086, 8088 series of microprocessors is used. PS/2 Computer: It is a laptop computer which is rechargeable and battery based system.
It follows the normal convention of BODMAS , which is the order of precedence of operations , so the answer equals to 26
A outlet has a acceptable voltage of 120 vollts and the knob depends on the tester you are using