A company manufactures safety helmets and inspects $150$ helmets each week for defects. The number of defective helmets found in each of $10$ consecutive weeks is as follows: $5$, $8$, $6$, $4$, $7$, $9$, $11$, $13$, $10$, and $14$. Using a $p$-chart, determine whether the process is in statistical control. If not, explain why.

The process is not in control because one week's proportion exceeds the upper control limit.

The process is in control because all sample proportions are within the control limits.

The process is not in control because the lower control limit is negative.

The process is not in control because the average proportion is above $0.10$.