$1$a$.\_\_\_\_\_\_\_\_$ can $be$ used $to$ describe the relationship $of$ quantities $in$ the system and they are the basis $of$ system analysis and design.

$a.$ Visual models

$b.$ Automated models

$c.$ Mathematical models

$d.$ Physical models

$1$b$.$ What are the open windows you see on the HOME tab when you open MATLAB R$2021$b$.$

i$.$ Workspace

ii$.$ Current folder

iii. Command History

iv$.$ Command Window

a$.$ i$,$ & ii

b$.$ i$,$ ii$,$ & iv

c$.$ i$,$ ii$,$ iii, & iv

d$.$ i$,$ ii$,$ & iii

$1$c$.$ Which of the following is not a professional computer simulation languages and tools that has been used in the pass $30$ years?

a$.$ SYSX

b$.$ MATLAB$/$Simulink

c$.$ MatrixX$/$System Build

d$.$ CSMP$-$C