A packed tower filled with particles $).$ Calculate the lateral pressures at the floor caused by the particles; the measured vertical pressure is $)=(15000\frac{N}{m^2}$

a$)976\frac{N}{m^2}$

b$)3000\frac{N}{m^2}$

c$)4276\frac{N}{m^2}$

d$)5000\frac{N}{m^2}$