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disp("Part a");
v1=9;
v2=2*1.5;
i=75*10^(-3);
v=v1-v2;
r=v/i;
disp("the resistance value (in Ω) required is"); disp(r);
disp("Part b");
p=v*i*10^3;
disp("the power rating (in mW) of the transistor is"); disp(p);
disp("Part c");
p1=v2*i*10^3;
disp("the power used (in mW) by the radio is"); disp(p1);
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