7. Utilizing the Routh–Hurwitz criterion, determine whether Systems 1 and 2 with the following polynomials are stable or unstable:

p s 1( ) = + s s 2 10 + 5,

p s 2( ) = + s s 4 3 + + 5 2 s s 2 0 10. +

a. System 1 is stable, System 2 is stable

b. System 1 is unstable, System 2 is stable

c. System 1 is stable, System 2 is unstable

d. System 1 is unstable, System 2 is unstable