No credit card required
RTA, the second entry
RTB, the third entry
RTC, the second entry
RTC, the fifth entry
RTC: The route to 10.5.8.0/24 points to the wrong next-hop address.
RTC: The route to 10.1.1.0/24 should be 10.5.1.0/24.
RTC: There is no route to 10.5.4.0/24.
RTD: The route to 10.4.5.0/24 should be 10.5.4.0/24.