$($Here are some hints if you have no idea where to start. Your correct approach may not look anything like this!

Create a $10$ by $1$ vector to hold the results for each confidence interval. It could be a Boolean vector holding values like TRUE and FALSE or a numeric vector holding values like $1$ and $0$ where $1$ means that the true mean is in the confidence interval and $0$ means that it isn't.

Create a "for loop" that will run $10$ times. Each time through the loop you can compute a new confidence interval using your previous code for Sally's confidence interval with minor adjustments, determine whether or not the true $$ is in the interval, and fill in the corresponding position in the results vector with your conclusion.