Any guidance on how to handle advance field dependencies needs outlned below for work item attributes?: This is all relative to a 1 workitem type and RTC 3.0.1 or newer.

Attribute 1: select from a list values, like OEM name (Ford, GM, Nissan, etc).
Attribute 2: select from a list values. Like Test Type (EMC, EDV, Abuse/Stress, etc.)
Attribute 3: it gives user a selection list values based on the combination of Attribute 1 and 2. In other word, the selection list of attribute 3 will be different either Attr 1 and 2 are different, or Attr 1 same but Attr 2 different.
Attribute 4: similar to Attribute 3, but it will give user different choice set based on users selection to attr. 1, 2 and 3.
Attribute 5: similar to Attribute 4, but it will give user different choice set based on users selection to attr. 1, 2 3 and 4.