plz solve this questions quickly plzzz on paper step by step

a) Express x[n]=(n+1)[n+3] in terms of u[n] where u[n] is the unit step and [n] is the unit sample sequences. [2. Mariss] Given x(n)=5 for n=1,2,4,6 and zero elsewhere. Is it energy sequence? Is it power sequence? Justify your answer. [2 Marks] IV) Draw the following signal x[n]=n Is y(t)=t1u(t) an energy signal or power signal or neither? Justify your