Consider a rectangular foam boat $12$ $cm$ wide by $30.7$ $cm$ long by $4.2$ $cm$ deep. Imagine this boat is loaded with enough cargo so the bottom sits $1.8$ $cm$ below the waterline. Determine the friction drag force if the boat moves at $0.9$ $m/s$ and the kinematic viscosity and density of water is $1.15\times 10^{-6}$ $m^2/s$ and $\rho=1000$ $kg/m^3$, respectively. $F_f=$ $N$