3. Calculate the Frenet apparatus (T, K, N, B, and 7) of the following curves: *a. α(s) = (³½³(1 + s)³/², ½(1 − s)³/², ±½s), s € (−1, 1) b. a(t) = (½et (sint + cost), ½e² (sin t cost), et) *c. α(t) = (√1+t², t, ln(t + √1+t²)) d. a(t) = (et cost, et sint, et) e. a(t) = (cosht, sinh t,t) f. α(t) = (t,t²/2, t√√1+t² + ln(t + √√1 + t²)) g. α(t) = (t-sint cost, sin² t, cost), t = (0,л)