Find the missing angles for each problem, given that lines a and b are parallel (step by step)

STEP BY STEP EXPLANATION:
4=86⁰ because the lines are parallel.
49⁰+86⁰=180
135=180
180-135
45
5=45⁰
2=49⁰ BECAUSE THE LINES ARE PARALLEL
NOW FOR ANGLE 1
45+86
131
as A & B ARE PARALLEL SO
1=131⁰
HOPE IT HELPS ;)