Answer
See the picture.
Work Step by Step
$Cumulative~relative~frequency=\frac{cumulative~frequency}{sum~of~all~frequencies}$
Total (sum of all frequencies): 50 weeks.
Cumulative relative frequency for "1" is $\frac{5}{50}=0.10$
Cumulative relative frequency for "2" is $\frac{12}{50}=0.24$
Cumulative relative frequency for "3" is $\frac{24}{50}=0.48$
Cumulative relative frequency for "4" is $\frac{30}{50}=0.60$
Cumulative relative frequency for "5" is $\frac{38}{50}=0.76$
Cumulative relative frequency for "6" is $\frac{43}{50}=0.86$
Cumulative relative frequency for "7" is $\frac{45}{50}=0.90$
Cumulative relative frequency for "8" is $\frac{49}{50}=0.98$
Cumulative relative frequency for "9" is $\frac{50}{50}=1$
