Loop & Merge function - within loop and merge a question that only applies once

Hi All,
I am new to the community and have scanned similar questions, but can't seem to find exactly my case. I'm building a survey that asks the respondent to choose all of the web apps they use and then loops them through a series of questions about each app. The problem I am running into is that one of my questions only applies once, but they way I have the survey configured to loop and merge the question gets asked for each app that was originally chosen.
For example:
Q1: Which app do you use? Select all that apply
App a - chosen response
App b
App c - chosen response
App d
Q2a: Do you use app a at work or personally
work - chosen response
personal
Q3a: You said you use app a at work. What kind of work do you do?
choice
choice
choice
etc
Q2b: Do you use app c at work or personally?
work - chosen response
personal
Q3b: You said you use app c at work. What kind of work do you do?

If the respondent indicates they use more than one app at work, I only want to ask them what kind of work they do once.
Help much appreciated!