The following table lists the trading information after the market open for YK company stock listed on the NYSE and belonging to Tier 1 stocks. The closing price of the previous day was 40.25.

Time	Trade Price
9:51	41.02
9:52	42.35
9:56	43.14
9:57	45.61
10:00	44.12
10:01	41.32

1. What would be reference price according to the circuit-breaker levels for each trading time?
2. At which time will the YK company stock trading stop and for how long?