With regard to the implementation of the e-visa system, (a) what is the status of and deadline for establishing the central adjudication hub, (b) what is the status of the development of the e-visa software system and deadline for its completion and (c) with a 10% decline in visa applications from China, India and Nigeria between 2018 and 2019 being attributed to longer turnaround times at missions, what actions are being taken by his department to strengthen the capacity of the specified missions that comprise 59% of all visa applications?