Not sure how to answer the RMD question?

It depends:  A RMD might be required depending on the terms of the IRA AND if you are more then 10 years younger than the deceased IRA owner.

If not, then say it was not a RMD or RMD not required.

Per IRS Pub 590B

https://www.irs.gov/pub/irs-pdf/p590b.pdf

Individual designated beneficiaries. The terms of
most IRAs require individual designated beneficiaries,
who are eligible designated beneficiaries, to take required
minimum distributions using the life expectancy rules (explained
later) unless such beneficiaries elect to take distributions
using the 5-year rule or the 10-year rule, whichever
rule applies. The deadline for making this election is
December 31 of the year the beneficiary must take the
first required distribution using his or her life expectancy
(or December 31 of the year containing the 5th anniversary
(or, for a surviving spouse, December 31 of the 10th
anniversary for the 10-year rule) of the owner’s death, if
earlier).
If the individual designated beneficiary is not an eligible
designated beneficiary, the beneficiary is required to fully
distribute the IRA by the 10th anniversary of the owner's
death under the 10-year rule.

Eligible designated beneficiaries. An IRA beneficiary
is an eligible designated beneficiary if the beneficiary is
the owner's surviving spouse, the owner's minor child, a
disabled individual, a chronically ill individual, or any other
individual who is not more than 10 years younger than the
IRA owner.