How do you solve this problem?

Question

Hello. Im a Tutor but I'm usually not sure if some of my questions are a bit to "hard" for the year 4's if your a child that is year 4 please solve these problems! Thank you, also please mind the title! I didn't have any other title to name my question.
1. Find the number of second in
a) 4.5
b) 2 days
c) 1 year
d) 3 hours 6 minutes 25 seconds
e) 1.1 minutes

2. Change each of these times to the unit shown:
a) 5 hours to minutes
b) 12 minutes to seconds
c) 8 weeks to days
d) 3.5 years to weeks
e) 4 days to hours
f) 580 secons to minutes

Please answer these questions if your in year 4,5 or 6. Those are the only questions I think are a bit to hard for my students! Please answer this, I really love my job and one of the parents say that I been giving them work that is year 8.

Answer 1

1)a)4.5

here 4 hours and 5 minutes

the number of seconds for 4.5 minutes = 4*60*60+5*60

=14400+300 = 14700seconds

b)2 days = 48 hrs =48*60*60 = 172800seconds

c)1 year = 365 days = 365*24*60*60 = 8760*3600 = 31536000seconds

d)3hours 6minutes 25seconds = 3*60*60+6*60+25seconds

= 10800+360+25 = 11185 seconds.

e)1.1minute = 60*60+60seconds = 3660seconds

2) a) 5 hours = 5*60 = 300minutes

b)12 minutes = 12*60 = 720seconds

c)8 weeks

1 week = 7 days

8weeks = 8*7 = 56 days

d)3.5 years

3.5 years =41 months = 41*30 = 1230days/7 = 176 weeks

e) 4 days

1day = 24 hours

4 days = 4*24 = 96hours

f) 580  seconds to minutes

1 minute = 60 seconds

580/60 = 96.666 minutes