For the cross section below, assuming $f_c^{\text{'}}=4,000$ psi, $f_y=40,000$ psi and normal weight concrete, do the following:

A$.$ Compute the maximum shear demand, $V_u,$ for which no stirrups are required.

B$.$ Compute the reduced shear capacity of the section, $V_n,$ with the stirrup layout shown in the figure.

Compute the spacing of the stirrups to obtain $A_{v,\text{m}\text{i}\text{n}}.$

Note: Keep in mind that for the shear capacity of the section only the width of the web $b_w$ is relevant. The width of the flange $"$ for this problem$)$ does not affect the shear response of the section