Question

Mathematical models of physical systems are important because
i. physical systems are of no use.
ii. they help understanding system behavior.
iii. they simplify physical systems.
iv. of cost reduction in controller synthesis.
which of the above is true?
a. ii and iy
b. i and ii
c. iii and iv
d. i and iii
Explain please ASAP ​

Answer 1

Explanation:

the answer is 2nd and 4th