Problem $8-09$ Perform the following complex number operations: $($a$)(50260\backslash$deg $)(4$ Z$80\backslash$deg $)=($b$)(0\mathrm{.}8-10\backslash$deg $)(3230\backslash$deg $)(4<20\backslash$deg $)=($c$)(5+$j$8)(4-$ j$2)=($d$)(48220\backslash$deg $)(10-$j$1)=($e$)(0\mathrm{.}9-$j$0\mathrm{.}5)(40+$j$10)=($f$)(4000$ Z$20\backslash$deg $)(2000$ Z$-20\backslash$deg $)(1000+$j$1000)$