Write log 2 (7√m3√n)/k2 as the sum and/or difference of logarithms. Express powers as factors.
a. (1/7) log 2 m + (1/3) log 2 n - 2log 2 k
b. (1/7) log 2 m ⋅ (1/3) log 2 n ÷ 2log 2 k
c. 7log 2 m + 3log 2 n - 2log 2 k
d. (7/2) log 2 m + (3/2) log 2 n - (2/2) log 2 k