Based on the following $R$ Chart for the $2nd10$ days of Monitoring, identify ALL of the patterns that require investigation. Points off for incorrect selections.

$2$nd $10$ days Monitor Reservation Processing Time R Chart

Day $7$ is above the upper control limit$.$

There is a trend of three points from days $2-4.$

There are two points in a row near the lower control limit on days $5$ and $6.$

There are two points in a row near the lower control limit on days $2$ and $3.$

Day $4$ is above the upper control limit$.$