in java code asnwer theses questions

$1.$ Write a single program containing several methods that will compute the sum of the first n

terms of the series in the specific manners outlined below. $($Let n $=100,000$ to start and if

you have time, try a million terms.$)$

a$)$ Sum the series forwards $($first term first$),$ using type double variables and literals.

b$)$ Sum the series backwards $($last term first$),$ using type double variables and literals.

c$)$ Sum the series forwards in two halves by computing the sum of the positive terms

separately from the negative terms and then combining the results at the end. Use type

double variables and literals.

d$)$ Sum the series backwards in two halves, computing the sum of the positive and negative

terms separately, using type double variables and literals.

e$)$ Sum the series forwards $($first term first$),$ using type float variables and literals.

f$)$ Sum the series backwards $($last term first$),$ using type float variables and literals.

$2.$ Have your program display the results from each of these methods in a table$-$like format,

clearly labeling the output. Use $15$ decimal places in your output. In a separate paragraph

speculate about which result you consider the most accurate $($including your calculator$),$ and

what accounts for any discrepancies, if there are any. You may also want to compare your

result against the math library method log$().$

in