QUESTION $60$

The following data occurs chronologically from left to right

$15\mathrm{.}2$

$19\mathrm{.}7$

$16\mathrm{.}0$

$11\mathrm{.}1$

$14\mathrm{.}8$

$14\mathrm{.}5$

The number of runs up and down is:

$5.$

$4.$

$2.$

$3.$

none of these.