Question: $1(30$ marks$)$

a$)$ For the rectangular section shown below the maximum allowable tensile stress in the concrete Fct $=3$ MPa $.$ Assume an cracked section and find the maximum moment the section can resist as well as the stress in the reinforcement for this moment. $(10$ marks$).$

b$)$ The rectangular section shown below is subjected to a moment of $M=257kN.m.$ Assume a cracked section and calculate the elastic stresses in the concrete and reinforcement at loading $(10$ marks$).$

$\backslash$table$[[$Cross$-$section:,$],[\backslash$table$[[$width$],[$height$]],b$:$=406*mm$