Bohai works in a shop that sells mobile phones. Last week he sold one mobile phone to each of 300 customers. The incomplete two-way table shows some information about these mobile phones. (a) Complete the two-way table. (3) Bohai selects at random one of these 300 customers. (b) Write down the probability that this customer bought a type B, 64 GB mobile phone. (1) Bohai now selects at random one of the customers who bought a type A phone last week. (c) Write down the probability that this customer bought a $$\(128 \mathrm{~GB}\)$$ mobile phone. (2)

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