For this circuit the time constant or "Tau" is 80 micro Farads (or$$80*10^-6$$)
My issue lies with questions b and c, as I thought the transient period is infinite, I cannot figure out when it ends . I am using the universal time constant formula $$(Final - Start) * (1-(1/e(^T/t))$$
lower case t being 80 x10 ^ -6. however what is meant to be my value for T ? I imagine this would allow me to solve b and c.
Very sorry to post a question like this however I have been trying to solve it for hours.