Total Hours worked:
Monday - 4 hrs + 4.5 hrs = 8.5 hrs
Tuesday - 3.25 hrs + 4.25 hrs = 7.5 hrs
Wednesday - 4.75 hrs + 5.75 hrs = 10.5 hrs
Saturday - 6 hrs + 2.5 hrs = 8.5 hrs
Sunday - 3.75 hrs + 5.25 hrs = 9 hrs
Total = 8.5 + 7.5 + 10.5 + 8.5 + 9 = 44 hours
For those first 40 hours, you get paid $14 per hour and for the excess ( 44 - 40 = 4), you get paid 14 * 1.5 = $21 per hour
So,
Gross Pay (week) = 40(14) + 4(21) = $644