Surface area how do I do this

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28

9.8? i'm not really sure