Write an apology
An apology is a formal justification or defense of a position.
Multitasking doesn't save you time. You just spend 3 hours doing 5 things at once, and then none of those things gets done.
I'm pretty sure it's scientifically proven that, while possible, multitasking is much less efficient than focusing on one task at a time. Yet, some people claim this as a great "skill" they possess. Hmmm. Overrated.
No such thing in the workplace other than talking and typing, typing and listening to music, walking and talking, eating and typing, sitting and typing etc. Sure, mothers and wives are exceptional in the things they CAN do, but for the average peron we do things one thing at a time depending on the brain-power it takes. Its hard to drive in a high-speed rush hour situation in bad weather and talk to someone with you or on the phone studies say.