Spacing for fence slats (S) can modeled by: S=(W-BN)/(N+1). S = spacing between slats, W= width between posts, N= number of slats, and B= width of one slat. Find the number of slats that will fit if W=95 ", B=3.5&S about( 1)/(2) ", rounded to the nearest slat. The number of slats for this fence is