A scuba diver descends at \(5 m / min\) for 6 minutes and ascends at \(5 m / min\) for 4 minutes.
(a) Write the descent as a multiplication of integers and find its value.
Expression \(=\)
Value \(=\)
(b) Write the ascent as a multiplication of integers and find its value.
Expression \(=\)
Value \(=\)