5. In a country telephone numbers consist of 7 digits where the first digit cannot be 1 or 0 (i) Find the number of possibilities for telephone numbers. (ii) Find the probability of randomly selecting...

Extracted text: 5. In a country telephone numbers consist of 7 digits where the first digit cannot be 1 or 0 (i) Find the number of possibilities for telephone numbers. (ii) Find the probability of randomly selecting a given telephone number from every possible number. (iii) How many different telephone numbers are possible if only even digits are used? (iv) Find the probability of choosing a telephone number in which only even digits are used. (v) Find the number of possibilities for telephone numbers if the first three digits are 593. (vi) What is the probability of randomly choosing a telephone number in which the first three digits are 593?