If (m) varies inversely as (p) and (w = 10) when (p = 5), find (k) and the value of (m) when (p = 25).
a) (k = 2), (m = 0.4)
b) (k = 0.2), (m = 4)
c) (k = 10), (m = 0.2)
d) (k = 0.4), (m = 2)