a) i) State what is meant by amplification as used in electronics. ii) Define the term voltage gain of an amplifier. b) The diagram below shows a common-emitter transistor amplifier circuit. i) Identify the type of transistor (NPN or PNP) typically used in this configuration and state the function of each of the following components: the base resistor (R_B), the collector resistor (R_C), and the coupling capacitor (C). ii) If the input signal voltage to the amplifier is 20 mV and the output voltage is 2.4 V, calculate the voltage gain of the amplifier. iii) The transistor has a current gain (h_FE) of 120 and the base current is 0.05 mA. Calculate the collector current. c) i) Explain why the output signal of a common-emitter amplifier is said to be 180° out of phase with the input signal. ii) State ONE advantage and ONE disadvantage of using a transistor amplifier in common-emitter configuration compared to common-base configuration.