(3) for σ = {a, b}, construct dfa’s that accept the sets consisting of(a) all strings with at least two a’s,(b) all strings with no more than two a’s(c) all strings with at least one b and exactly two a’s,

1. which of these is not true about torsion bars? a. they can be used to adjust ride height b. they can be adjusted anytime since they don't affect alignment angles c. they attach between the frame and the lower control arm d. they twist to produce a spring effect