Please help by tonight :) using MATLAB is preferred but any answer helps. THANK YOU!!

What is the fourth term of (x+2y)^3 (x+y)^8 after expanding?

a. 326*x^3*y^8

b. 326*x^8*y^3

c. 328*x^8*y^3

d. 326*x^3*y^8

What is z/y, where z=(x+y)^2 (x+2y)^3 ?

a. 3x^4+26x^3 y+55x^2 y^2+52xy^3+14y^4

b. 5x^4+32x^3 y+75x^2 y^2+76xy^3+28y^4

c. 8x^4+50x^3 y+114x^2 y^2+112xy^3+40y^4

d. 32x^3+150x^2 y+228xy^2+112y^3