State whether the following provisions impair or preclude negotiability, the instrument in each instance being otherwise in proper form. Answer each statement with either ‘‘Negotiable'' or ‘‘Nonnegotiable'' and explain why.

a. A note for $2,000 payable in twenty monthly installments of $100 each that provides the following: ‘‘In case of death of maker, all payments not due at date of death are canceled.''

b. A note stating, ‘‘This note is secured by a mortgage on personal property located at 351 Maple Street, Smithton, Illinois.''

c. A certificate of deposit reciting, ‘‘June 6, 2009, John Jones has deposited in the Citizens Bank of Emanon, Illinois, Two Thousand Dollars, to the credit of himself, payable upon the return of this instrument properly indorsed, with interest at the rate of 6 percent per annum from date of issue upon ninety days' written notice. (Signed) Jill Crystal, President, Citizens Bank of Emanon.''

d. An instrument reciting, ‘‘IOU, Mark Noble, $1,000.00.''

e. A note stating, ‘‘In accordance with our contract of December 13, 2009, I promise to pay to the order of Sam Stone $100 on March 13, 2010.''

f. A draft drawn by Brown on the Acme Publishing Company for $500, payable to the order of the Sixth National Bank of Erehwon, directing the bank to ‘‘Charge this draft to my royalty account.''

g. A note executed by Pierre Janvier, a resident of Chicago, for $2,000, payable in Swiss francs.

h. An undated note for $1,000 payable ‘‘six months after date.''

i. A note for $500 payable to the order of Ray Rodes six months after the death of Albert Olds.

j. A note of $500 payable to the assigns of Levi Lee.

k. A check made payable ‘‘to Ketisha Johnson.''