How to access my Gmail calendar/ agenda and "to do list" at Kontact along with KDE 5/ Kubuntu 16; 04?

[Bas G. Roufs Ned.]

Hello everybody.

Recently, I transferred from Kubuntu 14.04 LTS  along with KDE 4 to Kubuntu 
16.04 LTS along with KDE 5. To be honest, it is a bumpy transfer so far. Only 
after some trial, error and clicking, I managed to find out how to find out how 
to connect my gmail address book to Kontact - the procedure is a bit different 
apparently compared to Kubuntu 14.04/ KDE 4.

However, I do not yet manage to find out how to "add" my Gmail agenda/ calendar 
to Kontact @ KDE 5 - also there, the procedures differ apparently from those 
in Kontact along with KDE 4. 

A few attempts  to invoke the "To Do" list function at Kontact, end up in a 
crash of that package. 

Yours.

Bas.

- 
Bas G. Roufs
Van 't Hoffstraat 1
NL- 3514 VT  Utrecht
BasRoufs at gmail.com
+31 6 446 835 10