EP5/1 Failures and High score

The High Score: Chanayut Montrisuksirikul and Ronapart Srisupavanich 260/260

failures: 48011, 48021, 50342, 50380, 50399,

retest:
p 465 #22-25, 31-33, 48-51
p. 499 #42-45, 50-52, 56-58, and 61-63