@navneet.baron
sorry in advance if thre's somthing wrong .... i'm also a learner
lets start-
question 1
1-first of all you have to firgure it out the deviation.
2-apply formula { Dev N + dev S } = { Dev E + dev W }
3- now u actually can put the values in and figure it out the value of "dev N"
4-now u have all the deviations appy furmula.
For Dev A - sum of all deviation divided by 4
for dev b - East-west divided by 2
for dev c - North-south divided by 2.