function standalone_work_01-solution

a = [10, 2.5, 34, 28, 13, 16];
b1 = a(end:-1:1);
b2 = flip(a);
b3 = rot90(a)'

C = [1   8   5    4; ...
     4   6   9   -10; ...
     8  -2   2   -2; ...
     0   2   1   8];
det(C)
diag(C)
diag(rot90(C))
SC = sum(C,1)
SR = sum(C,2)
SR2 = sum(rot90(C))'
D = C(2:3, 2:3)
C(2:3, 2:3) = 5
C(:,4) = []

end