help please

Question 5/Vraag 5 Find an equation of the plane that contains the curve with the given vector equation: r(t) = (t, 4, t? ). Question 6/Vraag 6 Find the derivative of the vector function r(t) = sin ati + tej + cos? ctk. Question 7/Vraag 7 Evaluate the integral [(at1 + (t +1) Vik ). Question 8/Vraag 8 Show that, by taking logarithms, the general Cobb-Douglas function P = bLOK1-a can be expressed as In = Inb + aln *