Question

what is the main purpose of the tutorial in app lab?
to provide entertainment
to analyze data
to guide users through building apps step - by - step
to teach advanced programming concepts
when using setproperty(), what is a common error students might make?
setting properties without an id
not using the return() function
using too many properties at once

Explanation:

Without context about App Lab, it's hard to be certain. But typically App Lab is for building apps. So guiding users through building apps step - by - step is a likely purpose. Regarding setProperty(), setting properties without an ID is a common error as the system needs to know which element to apply the property to.

Answer:

1. To guide users through building apps step by step
2. Setting properties without an ID