Completely solve it from diagram numerical values given in figure...?

Consider the figure below. There are $3N18$ at the top, $4N18$ at the bottom, and a bonded tendon made by $12$ units of $12\mathrm{.}7mm$ strands. The prestressing force is $1,200kN$ immediately before the transfer. The Young's modulus of concrete is $32$GPa, whereas for steel reinforcements a value of $200$GPa can be taken for both prestressed and non$-$prestressed steel. The external moment is $600kNm.$

Calculate the diagram of stresses assuming:

a$)$ Uncracked cross$-$section.

b$)$ Cracked cross$-$section.