Q$4.$ A concrete mixture will be designed. The $28-$day compressive strength of the concrete by using $151515cm$ cubic specimens is required to be $25$MPa. Slump of the fresh concrete is specified as $10cm.$ Maximum size of the aggregate is $19mm.$ Other necessary data are given as:

Specific gravity of cement $=3\mathrm{.}1$

Bulk specific gravity of both aggregates $=2\mathrm{.}7$

Fineness modulus of fine aggregate $=2\mathrm{.}6$

Dry rodded unit weight of the coarse aggregate $=1600k\frac{g}{m^3}$

Absorption capacity of coarse aggregate $=1\%$

Absorption capacity of fine aggregate $=2\%$

Answer the following accordingly:

a$)$ What should be the water contents of the concrete?

b$)$ What should be the water$/$cement ratio?

c$)$ Determine the amount of SSD coarse aggregate?

d$)$ Determine the amount of SSD fine aggregate?