These are all multiple choice. Please, be kind enough to answer all. Thanks so much.

$1.$ The impedance of a capacitor is inversely proportional to the frequency, and the capacitor effectively blocks dc voltage.

a$.$ true

b$.$ false

$2..$ A coupling capacitor couples an ac signal into an amplifier without disturbing its operating point.

a$.$ true

b$.$ false

$3..$ The voltage gain of an amplifier is defined as the ac output voltage divided by the ac input voltage.

a$.$ true

b$.$ false

$4..$ The ac resistance of the emitter diode equals the ac base$-$emitter voltage divided by the ac emitter current.

a$.$ true

b$.$ false

$5.$ The common$-$collector amplifier has: a its collector at ac ground ib its collector at dc ground c$.$ its emitter at ac ground d$.$ its emitter at dc ground

$6..$ The ac collector current divided by the ac base current is referred to as: a$.$ dc current gain.

b$.$ ac current gain.

c$.$ alpha. d$.$ delta.

Figure $1$

$9..$ Which statement is true regarding the circuit shown in figure $1$ above?

a$.$ the ac input signal is amplified and inverted

b$.$ the ac input signal is amplified with no change to the phase

c$.$ the ac input signal is not amplified

d$.$ the ac input signal is attenuated