On a late Friday afternoon, when the office is nearly empty, you hear one of your coworkers next door - he’s clearly frustrated and pounding on his keyboard. He’s been your favorite colleague ever since you’ve started working for the company. He is somewhat older than you and obviously he is struggling with Excel spreadsheets again. Despite having your own work to finish for a Monday presentation, you decide to check on him. As the absolute Excel expert and a generally kind-hearted person, you offer your assistance. And, of course, not just because you've always been quite fond of the guy…