$3\mathrm{.}1$ Name a primitive data type in C$++.$

$3\mathrm{.}2$ Name a stream manipulator in C$++.$

$3\mathrm{.}3$ Add brackets to the following expression to get the answer zero. $2+\frac{8}{2}-5$

$3\mathrm{.}4$ Name a data structure in $C++.$

$[$TURN OVER$]$

$3$

$cos1511$

JAN$/$FEB $2022$

$3\mathrm{.}5$ Given the statement int ages $[10]=\{0\}$; what is the value of the element age $[5]?$

$(1)$