Using a 20 mL volumetric pipet, a student transfers a sample of sulfuric acid into a 100 mL volumetric flask and dilutes

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Using a 20 mL volumetric pipet, a student transfers a sample of
sulfuric acid into a 100 mL volumetric flask and dilutes to the
calibration mark following proper procedure. The student uses the
20 mL pipet to transfer a sample of the diluted acid (following
pre-treatment) into a clean Erlenmeyer flask and adds 2 drops of
PHTH indicator solution. After pre-treating and filling the buret
with NaOH solution, the student notes an initial solution level of
1.43 mL on the buret. The student records a concentration of 0.1488
M NaOH from the carboy. The student adds the NaOH solution dropwise
to the diluted acid solution with continuous swirling until a faint
and persistent pink color is observed. The student records a
solution level of 15.37 mL on the buret. What is the concentration
of sulfuric acid in the diluted solution and the stock
solution?