No.
(a) 3 = e-2k: This could only be true if k is negative and therefore N increases.
(c) 2/3 = e-2k: This means that N decreases by a factor 3/2 in 2 days.
(d) ln(3/2) = -3k: This means that N increases by a factor 3/2 in 3 days and k is negative.
(e) ln(1/3) = -3k: This means N decreases by a factor 3 in 3 days.

Proceed