Determine the base transit time, base transport factor, emitter efficiency and common emitter current gain in forward active mode at room temperature. Assume negligible recombination at the emitter-base junction. [Hint: You may find it useful to recall the formulae derived in tutorial questions 1 and 3.] (b) By trial and error, find the new value of base width required to achieve a current gain of 80. An accuracy of 0.01 m is sufficient. Show the results of all intermediate calculations