step 1
Find out the value of a
we have that
a=81 degrees -----> by alternate interior angles
step 2
Find out the value of b
we have
b+68=180 degrees ----> by form a linear pair (supplementary angles)
b=180-68
b=112 degrees
step 3
Find out the value of c
we have that
c=b -----> by corresponding angles
so
c=112 degrees
step 4
Find out the value of d
Remember that
The sum of the interior angles in any triangle must be equal to 180 degrees
so
d+68+81=180
d+149=180
d=180-149
d=31 degrees
step 5
Find out the value of e
we have that
e=68 degrees -----> by corresponding angles