[401-402]

"Incredibly challenging but essential. Passing 401 is a relief for anyone on the ARM journey, as it's often cited as the hardest exam. Highly recommend using a study group or a supplemental guide to get through the concepts." Aviation: Cessna 401 and 402

These episodes kicked off Season 4 and are often reviewed together for their world-building and rising tensions. [401-402]

This specific vacation rental is highly rated for its mountain views and convenient "lockoff" setup, which connects two separate units. "Incredibly challenging but essential

Available via platforms like Abode Vacation Rental and Vrbo . TV: The Expanse (Episodes 401 & 402) [401-402]

In academic contexts, these often refer to intermediate economics or Risk Management (ARM) designations.