Question: For a UTRA FDD User Equipment (UE) supporting High Speed Downlink Packet Access (HSDPA), which of the following UE capability categories are subject to MIMO performance requirements for HS-DSCH in multi-path fading environments, as per Release 7 and later releases?
Option 1: Categories 5 - 8
Option 2: Categories 10 - 12
Option 3: Categories 20 - 22
Option 4: Categories 15 - 18
Explanation: This is correct because, according to the specification, the MIMO performance requirements for the High Speed Physical Downlink Shared Channel (HS-DSCH) in multi-path fading environments apply specifically to Release 7 and later releases for all types of UTRA FDD UE that support HSDPA with UE capability categories 15 through 18. This directly matches Option 4, making it the correct choice. The other options list different category ranges not mentioned in the context provided.