Please explain how you did it !
If u can help me with # 4 and 5

s×s=169

find the square root of both sides

s=13

xsquared=26

The answer is (a) I and II.

Step-by-step explanation:  We are given to select which one of the given four options give a valid reason why the currency exchange you plan ahead of time might not be wholly accurate.

Statement I is correct, because Currency exchange rates remain fluctuating and so the actual rates we get afterwards may be different from the planned rates.

Statement II is also correct, because most of the currency exchange services charge a fee or surcharge that differs from service to service. So, this may also affect our calculations.

Statement III is not correct, because the amount of money we actually receive will not depend on the taxes in other countries.

Thus, the correct option is (a) I and II.