In footnotes to its 2016 annual report, Bancfirst Corp. reported that held-to-maturity debt securities with an amortized cost of $4,365 thousand had an estimated fair value of $4,403 thousand. a. What amount does Bancfirst report on its 2016 balance sheet for these held-to-maturity securities? b. If these debt securities had instead been classified as available-for-sale securities, how would Bancfirsts pretax income have been affected