End of Life/Support Hardware

I am preparing our cyber Essentials submission and need to identify any end-of-life hardware. Most manufacturers have a method of determining whether a model has become obsolete, but Dell does not. Hopefully, someone from Dell can assist. These are the models I need to confirm are not EOL.

• Inspirion 5491 (2 in 1)
  Inspiron 5406 2-in-1
  Inspiron 5482
  Latitude 3310 2-in-1
  Latitude 3340
  Latitude 5285
  Latitude 5290
  Latitude 5290 All-in-one
  Latitude 5400
  Latitude 5430
  Latitude 5440
  Latitude 5490
  Latitude 5530
  Latitude 7280
  Latitude 7480
  Latitude 7490
  Lattitude 5280
  Optiplex 5050 SFF
  Optiplex 5060
  Optiplex 5080
  Precision 3561
  Precision 3571
  Precision 3640 Tower
  Precision 3650 Tower
  Precision 5820
  Precision 7750
  Precision Tower 3660