Please solve $5$ and $6$

In the adjacent circuit, capacitor C is fully charged prior to switch S$1$ opening, followed by switch S$2$ closing a short time later at time $t=0.$ Determine the voltage across the capacitor after $1$ second. $*$Hint: should be between $1-1\mathrm{.}5$ V$.(5$ points.$)$

The capacitor, C $,$ is fully discharged prior to the switch closing. Determine the time required to charge the capacitor to $5$ V after switch closure. $($Hint: You can check your answer on this problem.$)(4$ points.$)$