1. What does the following calculate on a matrix m?

a.
>> sum(m(m > 5))

b.
>> sum(sum(m .* (m > 5)))

c.
>> sum(m .* m > 5)

2.
Out of 100 randomly generated numbers between 0 and 100, calculate the sum of all of
the numbers that are greater than or equal to 50. First, generate the random number vec-
tor/matrix and then get the sum as two separate statements.