Using this matrix, answer the following questions about the period from $2018$ to $2021.$

$2021(1)(2)(3)(4)(5)(6)(7)(8)$

$(1)$ Sales manager $0\mathrm{.}950\mathrm{.}05$

$(2)$ Sales representative $0\mathrm{.}050\mathrm{.}600\mathrm{.}35$

$(3)$ Sales apprentice $0\mathrm{.}200\mathrm{.}500\mathrm{.}30$

$(4)$ Assist plant manager $0\mathrm{.}900\mathrm{.}050\mathrm{.}05$

$(5)$ Production manager $0\mathrm{.}100\mathrm{.}750\mathrm{.}15$

$(6)$ Production assembler $0\mathrm{.}100\mathrm{.}800\mathrm{.}10$

$(7)$ Clerical $0\mathrm{.}700\mathrm{.}30$

$(8)$ Not in organization $0\mathrm{.}200\mathrm{.}500\mathrm{.}000\mathrm{.}100\mathrm{.}200\mathrm{.}30$

Which group of employees were least likely to change positions in the organization between $2018$ and $2021?$

$($Click to select$)$

Which group of employees were most likely to exit the organization?

$($Click to select$)$

Which group of employees in $2021$ were most likely to be external hires?

$($Click to select$)$

Which group of employees from $2018$ have the highest number still in the organization in $2021?$

$($Click to select$)$