How about Answer ?
2 Answers
See below
Explanation:
Sorting out the units in the current density formulation:
# 10^4 mA equiv  10 A#
Surface
#mathbf hat n = ((0),(1),(0))#
Following the definition of flux:
On surface

#y =1 implies e^( 2y) = 1/e^2# . 
#dS = dx \ dz# .
As explained by @ultrilliam we need to take argument of
#I=10^4 e^(2) sin2#
#=>I=10^4 xx0.1353xx 0.9093#
#=>I=1230\ kA#
#=>I=1.230\ MA#
Only problem is how on earth the student will know this !
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