Which three of the following are identified as the major losses that downgrade OEE? $(1)$ equipment breakdown, $(2)$ availability, $(3)$ setup and adjustments, $(4)$ performance efficiency, $(5)$ defects and rework, $(6)$ rate of quality.

a$.$

$1,3,$ and $5$

b$.$

$1,3,$ and $6$

c$.$

$3,5,$ and $6$

d$.$

$2,4,$ and $6$