A radar unit consists of two primary components: a power supply and a transceiver. The power supply has a constant failure rate of 0.0034 failures per operating hour and takes an average of 4 hr (mean) to repair (constant repair rate). The transceiver fails an average (mean) of every 100 operating hours (constant failure rate) and takes 3 hr to repair (constant repair rate). What is the point availability of the radar unit after 12 hr use? How much does this differ from the steady state availability? If two radar units are operating in parallel (high-level active redundancy), what are the point, interval (after 12 hr), and steady state availability