Chaplets are used to support a sand core inside a sand mold cavity. The design of the
chaplets and the manner in which they are placed in the mold cavity surface allows each chaplet to sustain a force of 45 N. Several chaplets are located beneath the core to support it before pouring; and several other chaplets are placed above the core to resist the buoyancy force during pouring. If the volume of the core = 5450 cm3, and the metal poured is steel, determine the minimum number of chaplets that should be placed (a) beneath the core, and (b) above the core (Sand density = 1.6 g/cm3, steel density = 7.82
g/cm3).