Two switching centres are connected by 20 trunks, with a busy-hour traffic of 0.5E per trunk. Use the data in Table 1 to find the probability that a trunk will be unavailable for a call, given that callers are unable to find a free line either:- i) ii) Hold on even though unconnected. Terminate the call immediately and do not try again. Table 1 k 10* k! M * 10 10 2755.7 12842.3 11 2505.2 15347.5 12 2087.7 17435.2 13 1605.9 19041.1 14 1147.1 20188.2 15 764.7 20952.9 16 477.9 21430.8 17 281.1 21712.0 18 156.2 21868.2 19 82.2 21950.4 20 41.1 21991.5

Why must kmaps consist of the following two things:1: groups have to be recanges with sizes of power 2 2: Why do we order our rows and colums 00/01/11/10?

Figure 2 Bit error graph (image insterted)   The numbers on the right of Figure 2 are multipliers. For example, working upwards from the horizontal line representing 10–10, the next horizontal line up represents 2 × 10–10; the next line up represents 4 × 10–10, and so on. The next line up from 8 × 10–10 has no number on the right and represents 10 × 10–10, which is 10–9, as shown on the vertical axis on the left. In mobile cellular communications, the signal-to-noise ratio is often poor, particularly indoors. Suppose that at an indoor location the signal-to-noise ratio is 7 dB. What would the corresponding bit-error probability be?   A rule-of-thumb in mobile communications engineering is that the signal-to-noise ratio indoors is 10 dB worse than outdoors at the same location. Using this rule-of-thumb, what would the bit-error probability be outdoors at the same location as in (a)?   By what factor has the signal-to-noise ratio improved by moving from indoors to outdoors? Express…

Please express your answer as an integer and in terms of K