is$($t$)=$ A$$cos $(1000$t$+)+$ A$2.$cos $(2000-)$ Assume the system is in steady state. Find the current in at times t$=4$ ms: ia$($t$)=$ B$1$ t$2=5$ ms: ia$($t$2)=$ B$2$ kia$($t$)+$ is$($t$)(1$ R$1$ ia$($t$)$ C L R$2$ Given Variables: A$1$:$3$A A$2$:$2$ A L:$2$ mH C: $500$ uF R$1$:$1$ ohm R$2$: $2$ ohm k: $4$ V$/$A Calculate the following: B$1($A$)$: