Find the maximum active soil pressures for the following systems:

a$.$ Cantilevered system in granular soil $($medium dense cohesionless sand$)$

b$.$ Single brace system in fine grained cohesive soil $($loose fine silty sand$)$ with $200$ psf of

soil shear strength

c$.$ Multiple brace system in granular soil $($medium dense gravel with sand$)$