To answer part b, we need to compute the point estimate of the population proportion $\hat{p}$. This is given by the formula:

$\hat{p} = \frac{x}{n}$

Where:

• $x$ is the number of successes (customers who used the coupon),
• $n$ is the total sample size.

From the problem, $n = 100$. If you have the number of successes ($x$), please provide that information, and I will compute the value for $\hat{p}$ to two decimal places.

Let me know, or clarify further if needed!