Calculate the molarity and molality of a 15% solutions (by weight) of sulphuric acid density $1.020g cm^{-3}$.(Atomic masses H=10=16S=32 amu)

Question

$\begin{array}{1 1}\text{1.3048 molar,1.53 molal}\\\text{2.3048 molar,2.53 molal}\\\text{3.3048 molar,3.53 molal}\\\text{4.3048 molar,4.53 molal}\end{array}$