I need help on STAT please!!

These 31 girls are an SRS of all seventh-grade girls in the school district.

Suppose that the standard deviation of IQ scores in this population is known to be = 15. We expect the distribution of IQ scores to be close to Normal. Below is the distribution's stemplot.

7 24

8 69

9 1368

10 023334578

11 1122244489

12 08

13 02

1.True or False: There are no major departures from Normality.

2. MULTIPLE CHOICE: Estimate the mean IQ score for all seventh-grade girls in the school district, using a98 % confidence interval.

A. 99.57 to 112.11

B. 105.84 to 132.00

C. 100.56 to 111.12

D.72.00 to 132.00