Step 1 :Let \(X\) be the number of units produced in a day. Then \(X\) follows a Poisson distribution with parameter \(\lambda = 10\).
Step 2 :To find the probability of producing exactly 12 units in a day, we use the probability mass function of the Poisson distribution: \(P(X=k) = \frac{e^{-\lambda} \lambda^k}{k!}\).
Step 3 :Substitute \(k=12\) and \(\lambda=10\) into the formula: \(P(X=12) = \frac{e^{-10} 10^{12}}{12!}\).
Step 4 :Calculate the probability: \(P(X=12) \approx 0.0948\).
Step 5 :To find the probability of producing at most 8 units in a day, we need to sum the probabilities of producing 0 to 8 units: \(P(X \leq 8) = \sum_{k=0}^{8} \frac{e^{-10} 10^k}{k!}\).
Step 6 :Calculate the probability: \(P(X \leq 8) \approx 0.3328\).
Step 7 :The final answer is \(\boxed{0.0948}\) for exactly 12 units produced and \(\boxed{0.3328}\) for at most 8 units produced.