Problem $3\mathrm{.}4.$ Errors in summation

The following code is supposed to compute the sum s $=$

PM

k$=1$

$1$

$(2$k$)$

$2,$ for M $=3.$

s $=0$

M $=3$

for i in range$($M$)$:

s $+=1/2*$k$**2$

print$($s$)$

The program has three errors and therefore does not work. Find the three errors

and write a correct program. Put comments in your program to indicate what

the mistakes were.

There are two basic ways to find errors in a program:

$1.$ Read the program carefully line by line, and think about the consequences

of each statement. Look for inconsistencies in the form of variables being

used before they are defined, and perform the calculations in the statements

by hand to see how variables change their value.

$6$