The following table contains data on market advances and declines.

$\backslash$table$[[$Market Advances$],[,$Advances,Declines$],[$Day$,($in millions$),($in millions$)],[1,911,706],[2,663,991],[3,735,794],[4,522,973],[5,502,1,021],[6,981,722],[7,1,007,610],[8,908,717],[9,855,741],[10,771,771]]$

Required:

a$.$ If the trading volume in advancing shares on day $1$ was $1\mathrm{.}6$ billion shares, while the volume in declining issues was $1\mathrm{.}3$ billion shares, what was the trin statistic for that day? $($Do not round intermediate calculations. Round your answer to $4$ decimal places.$)$

$\backslash$table$[[$Trin statistic$]]$