he voltage source

originally has a DC offset Vdc $=0$V and peak$-$to$-$peak voltage Vpp

$($i$)$ Write a piecewise expression for the current through R$1$ if Vpp $=10$V$.$ Hint: Rather

than write the function piecewise in time, you may write it piecewise with respect to

the value of the voltage source.

$($ii$)$ Write an expression for the current through R$1$ if Vdc $=1\mathrm{.}4$V$.$

$($iii$)$ Write an expression for the current through R$1$ if Vdc $=1\mathrm{.}4$V$.$

$($iv$)$ If the diodes were ideal with Vthreshold $=0$V$,$ how does the circuit behavior change?