$1$ Hyperfine structure of hydrogen

$)$ Draw schematically the hyperfine structure splitting of the states $1^2{S}_{\frac{1}{2}}$and $2^2{P}_{\frac{3}{2}}$ of hydrogen $($I $=1/2)!$

b$)$ By what value are the hype fine structure levels from a$)$ lowered or raised energetically $(A_{1^2{S}_{\frac{1}{2}}}=1420$ MHz$,A_{2^2{P}_{\frac{3}{2}}}=12$ MHz$)?$