In the previous exercises, we looked at creating a computation of the Body Mass Index with a combineLatest to combine both the height and the width as they changed to calculate the result. In this set of exercises, we will take this one step further to combine both height1 and height2 to calculate the BMI. Just a hint that merge here is your friend to combine Observables.
As always, for more information about Observables, check out the RxJS Documentation
In these exercises, this will require the problem1.html file to used to run these examples.