Question Three $16$ Marks$]$

Air at $12C$ DBT and $70\%RH$ is to be heated and humidified $036\mathrm{.}5CDBT$ and $21C$ WBT $.$ The required conditions are achieved first by heating, then by adiabatic humidifying, and finally by heating. The relative humidity of air coming out of the humidifier is $70\%$ R$.$H$.$ determine:

$($a$)$ Plot the process on the Physcromtric diagram

$($b$)$ The amount of moisture removed from the moist air per kg of dry air

$($c$)$ The air temperature at the exit from the first heater.

$($d$)$ The total heating requirEd

Solve it in details and wrong answer will be downvoted