$9.$ Given the partial specification below, determine the maximum w$/$c ratio for concrete with the partial specifications given below $($assume $15$ test data are available with standard deviation of $322$ psi for a concrete with $5400$ psi $($i$.$e$.,$ similar$)$ compressive strength$)$ if the specified mixture is to be used in a steel reinforced concrete pavement with severe exposure to freeze$/$thaw$,$ deicing salts, and sulfates.

Given the partial specification below, determine the maximum w$/$c ratio for concrete with

the partial specifications given below $($assume $15$ test data are available with standard

deviation of $322$ psi for a concrete with $5400$ psi $($i$.$e$.,$ similar$)$ compressive strength$)$ if

the specified mixture is to be used in a steel reinforced concrete pavement with severe

exposure to freeze$/$thaw$,$ deicing salts, and sulfates.

a$.0\mathrm{.}32$

b$.0\mathrm{.}33$

c$.0\mathrm{.}36$

d$.0\mathrm{.}40$

e$.0\mathrm{.}45$