Having error with defining max points and graphing multiple things on one graph

I figured out with some help how to graph the max deflection and max load on the same graph as the function line, bu I can not figure out how to fist off define the max stress and max strain points with the x and y components, as well as i can not figure out how to get the linear stress and linear strain to graph on the same plot as the function. It gets all messed up. my code is attached below, if someone could take a look it would be much appreciated.

clc;clear all,close all;

    D = [0:0.1:1.4]/200;
    L = [0 1 2 3 4 5 6 6.8 6.5 6 5.5 5.4 5.3 5.25 5.22]*1000;

    %calculating the deflection and load

    Deflection = [0:0.01:1.4]/200;
    Load = spline(D,L,Deflection);
    Load = Load+rand(size(Load));

    [maxDeflectiony maxDeflectionx] = max(Deflection);
    x_Defl_max = Deflection(maxDeflectionx);
    y_Defl_max = Load(maxDeflectionx)

    [maxLoady maxLoadx] = max(Load);
    x_Load_max = Deflection(maxLoadx);
    y_Load_max = Load(maxLoadx);

    crossSecArea = 0.000015;

    Stress = Load * crossSecArea;
    Strain = ((Deflection-0.1)/0.1);

    [UltStressy UltStressx] = max(Load) * crossSecArea;
    x_UtlStress = Strain(UltStressx) * crossSecArea;
    y_UltStress = Stress(UltStressx) * crossSecArea;

    engineeringStrain = ((Deflection-0.1)/0.1);

    linearStress = Stress(2:65);
    linearStrain = Stress(2:65);

    YM = linearStress./linearStrain;
    youngsModulus = mean(YM);

    figure(1)
    handle_a = plot(Deflection,Load);
    set(handle_a,'linewidth',1.5);
    hold on
    plot(x_Load_max,y_Load_max,'-.r*','MarkerSize',10,'MarkerFaceColor',[.49 1 .23]);hold on
    plot(x_Defl_max,y_Defl_max,'-.go','MarkerSize',5,'MarkerFaceColor',[.49 1 .63]);hold off

    handle_x = xlabel('Deflection [m]');
    set(handle_x,'fontname','times','fontsize',16)
    handle_y = ylabel('Load [N]');
    set(handle_y,'fontname','times','fontsize',16)
    handle_title = title('Deflection vs Load');
    set(handle_title,'fontname','times','fontsize',20)

    grid on

    axis([0 0.0071 0 7000]) 

    %print('-dpng','-r200','homework_4_plot2_DL')

    figure(2)
    handle_b = plot(Strain,Stress);
    set(handle_b,'linewidth',1.5);
    hold on

    plot(x_UltStress,y_UltStress,'-.r*','MarkerSize',10,'MarkerFaceColor',[.49 1 .23]);hold on
    %plot(x_Defl_max,y_Defl_max,'-.go','MarkerSize',5,'MarkerFaceColor',[.49 1 .63]);hold off

    %plot(linearStress)
    %hold on
    %plot(linearStrain)
    %hold on

    handle_x = xlabel('Strain')
    set(handle_x,'fontname','times','fontsize',16)
    handle_y = ylabel('Stress [MPa]')
    set(handle_y,'fontname','times','fontsize',16)
    handle_title = title('Strain vs Stress')
    set(handle_title,'fontname','times','fontsize',20)

    grid on

[dpb]

>>  [UltStressy UltStressx] = max(Load) * crossSecArea;
Error using  * 
Too many output arguments. 
>>