Answer
See below.
Work Step by Step
I plug in the values into the function:
a) $F(2)=3$
b) $F(7)=5\cdot int(7+1)+1=5\cdot8+1=41$
c) $F(15)=50$
d) $F(8.4)=5\cdot int(8.4+1)+1=5\cdot9+1=46$
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