Answer Happy

Just a and c please.
*2. Decide whether the following sets of vectors are linearly independent. a. {[:] [:30 -:) CM2x2 b. {fi, f2, f3} CP1, where fi(t) = t, f2(t) =t+1, f3(t) = t +2 c. {fi, f2, f3} C C (R), where fi(t) = 1, f2(t) = cost, f3(t) = sint d. {fi, f2. f3} C C°(R), where fi(t) = 1, f2(t) = sin’t, f(t) = cost e. {fi, f2. f3} CC (R), where fi(t) = 1, f2(t) = cost, f3(t) = cos 2t f. {fi. f2. f3} C C (R), where fi(t) = 1, f2(t) = cos 2t, f3(t) = cost