CCENT 2018 course possible wrong answers?

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I could be wrong but inn the subnetting pratice questions at the end of the CCENT 2018 series, are the answers given for questions 4 and 5 incorrect?

for question 4 you ask
Which of the following is the correct broadcast address for 192.168.12.65/29?
Your answer says d. 198.168.12.127
I get a block size of 8 for /29, so shouldn't the broadcast be 198.168.12.71 instead of 198.168.12.127?

for number 5 you ask
Which addresses are valid addresses for the hosts? choose 2
a. 172.16.1.255/23
b. 172.16.2.255/23
c. 172.16.2.0/23
d. 172.16.1.0/23

your answer says a and d in the notes
and a and c in the video.

in the notes answer a. got changed to 172.16.0.255/23 and video has a. as 172.16.1.255/23

should the answer be
a, b and d from the notes and b and d in the video?

@Bill-Machut,
This was supposed to be updates as I reshot this episode to correct the very issues you mentioned. I was told this was overlooked. It happens sometimes. Thanks for letting us know.

yeah that threw me off a bit..
....but I believe there is also an incorrect answer PART 2, in number 9.

Which of following is a valid subnet mask (choose 2)?
a. 255.252.255.0
b. 252.255.255.0 *
c. 255.255.248.0 *
d. 255.255.255.255

He stated there were 24 "1s" in a row when going over choice B.
Probably not necessary to re-shoot, maybe just highlight it in the notes with an alert or some sort.

@J-G,

Thanks, I'll take a look at it.

Filename: cisco-ccent100105-6-1-1-subnetting practice
Topic Name: 1.0 Network Fundamentals
Episode Name: Subnetting Practice

ERRATA
On the penultimate question, I forgot to put the right answer in D. With the /29, that should be 192.168.12.71/29 as the broadcast ID.

On the last question here, I changed the answer so they do not match in the video. The note has the correct one marked as the /23 represents the range 172.16.0.1 - 172.16.1.255

Filename: cisco-ccent100105-6-1-2-subnetting-practice-pt2
Topic Name: 1.0 Network Fundamentals
Episode Name: Subnetting Practice Pt2

ERRATA
the penultimate question has wrong answer on video as well as notes. There is only one answer. That is correct. That would be c.