You are working on a dataset that has $5000$ rows and four columns: n$1,$ n$2,$ c$1,$ c$2.$ You conducted a preliminary analysis and got the below result.

Count

n$1$

$4987$

n$2$

$4951$

c$1$

$5000$

c$2$

$4871$

$70-$

$50$

$50-$

$40$

$30$

$20$

$10$

$200$

$150$

$100$

$50$

$20$

$11$

Histogram of ni

$12$

$13$

$50000$

$100000$

Histogram of n$2$

$150000$

Group $9$

No

$50$

$100150$

Bar chart of cl

$200$

$250$

$2$

Group $10$

Group $1$

$20$

Bar chart of c$2$

$50$

Based on the charts, please discuss which preprocessing steps you will perform on this data. You are free to make any further assumptions if needed, but please specify them.