If each of the number in the following sum is increased by $t$, the new sum would be $5.32$. What is the value of $t$ ? <br> 0.63 +0.82 +0.39 +0.85 = 2.69

Question

$\begin{array}{1 1} (a)\; 0.6575 \\ (b)\;0.6375 \\ (c)\; 0.6475 \\ (d)\; 0.6875 \end{array}$