Android How to execute flow.map() in viewModel on Dispatchers.Default

I am developing an Android application, using the MVVM design pattern.

So, I have a repository that exposes a flow<T> to a ViewModel. The ViewModel then converts the flow<T> to LiveData<T> using asLiveData() as per the code below.

repository.getFlow().map {
    // I will do some long running work here
}.asLiveData()

As you can see, I will do some long-running work in map { }. So I want to execute the code inside map { } in Dispatchers.Default thread.

From my research, I can do with flowOn(Dispatchers.Default) or asLiveData(viewmodelScope.coroutineContext + Dispatchers.Default) as per the code below.

1. map{} with flowOn(Dispatchers.Default)

repository.getFlow().map {
   // I will do some long running work here
}.flowOn(Dispatchers.Default).asLiveData()

2. map{} with asLiveData(viewmodelScope.coroutineContext + Dispatchers.Default)

repository.getFlow().map {
   // I will do some long running work here
}.asLiveData(viewmodelScope.coroutineContext + Dispatchers.Default)

I'd like to understand better about coroutine context, scope and flowOn(). So my questions are as follows

1-1. Does asLiveData(viewmodelScope.coroutineContext + Dispatchers.Default) mean that asLiveData() function will execute in a new coroutine with Dispatchers.Default in viewmodelScope?

1-2. So, then the map {} function executes in the new coroutine with Dispatchers.Default because flow's intermediate operator executes in consumer's coroutine?

2. I also read flowOn(Dispatchers.Default) executes the upstream flow in the CoroutineContext defined in flowOn() function, which mean that the map{} will execute in Dispatchers.Default thread. Is it fine to use flowOn() in viewmodel with asLiveData()?

Thank you guys