For the waveform below, assume the Amplitude $\backslash (\backslash$mathrm$\{$A$\}=24\backslash$mathrm$\{$~V$\}\backslash ).$ Please answer the following questions by filling in the blanks:

$-$ The magnitude of the DC level component is Blank $1$ V $.$

$-$ The period of the waveform T$=$ Blank $2$ s $.$

$-$ The magnitude of the first coefficient for the fundamental frequency component of the trigonometric Fourier series is $-$Blank $3$