The answer is: 90° .
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Jack incorrect plotted the third quartile.
Explanation:
$42.
13/2 = 6.5, 25/4 = 6.25, 42/7 = 6.
From 1st equation
d + e = 2
d = 2 - e
From 2nd equation, subtitute d with 2 - e
d - e = 4
2 - e - e = 4
2 - 2e = 4
-2e = 2
e = -1
Find d
d = 2 - e
d = 2 - (-1)
d = 3
The solution is (3,-1)
