1. [10 points] Determine a Human Error Probability (HEP) for the number of times you have dropped your phone in the past year. Provide a rough estimate based on the generic HEP equation. Then select the three most common Performance Shaping Factors (PSFs) which contributed to this HEP (Probability of dropping your phone), classifying each one as either being internal or external, and consider one strategy based on these PSFs that would help in mitigating this human error.