Idensity the error that exist in this method program:

public steric vald $f($doubin oasic, dowble hour$)$ double extra;

Tibasic $>-1000)$

extra $=$ basic$+$ hour ${?}^{**}0\mathrm{.}3$;

else point $2000$

exth $=$ basic'hour $0\mathrm{.}4$ ;

eise

extra$-$basic'hour'$0\mathrm{.}5$;

return extra;

Your answer:

Wrong method header

Variable extra is unkrioun

A wrong use of hour data type

No error