Find 
and 
if possible, and find the slope and concavity (if possible) at the point corresponding to 
.
?
?
?
A. 
, 
; at 
: slope 1 and concave down
B. 
,
; at: slope -1 and concave down
C. ,
; at: slope -1 and concave up
D. 
,
; at: slope 1 and concave up
E. ,
; at: slope of -1 and concave down
Answer: E
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