Previously, we were able to combine together two sequences, both height1 and height2 using merge. Now, we're going to take this a step further by create an Observable messages which emits the string "System failed because of ${failure} after the user ${action}" with ${failure} and ${action} appropriately replaced, based on connectionFailures, renderFailures, and userActions. Which operator might work best here? We've covered zip and combineLatest, but are there other operators that can do this? A quick hint is for withLatestFrom...
As always, for more information about Observables, check out the RxJS Documentation