Which three statements are true about ASM performance and scalability?

Disks in a diskgroup may be of varying speed and capacity without affecting performance. 

Disks in a diskgroup should match in speed and capacity for best performance. 

A database seldom needs more than two diskgroups: one for data and the other for a fast recovery area. 

A database needs a separate diskgroup for each major tablespace, redo logs, and fast recovery area. 

Multiple databases that use the same diskgroup make the best use of space.                                    

Multiple databases that use a separate diskgroup for each database make the best use of space.