Read the following text carefully:
The growing carbon footprint of industries has put the power and steel sectors in the spotlight as major contributors to the climate crisis. The challenge of climate change can be tackled only by making our industries and businesses follow practices and processes that reduce their carbon footprint. This can be achieved only through green financing.
Green financing aims to increase the level of financial flows (from banking, micro-credit, insurance, and investment) from the public, private, and not-for-profit sectors toward sustainable development priorities.
Global green finance has also started targeting Indian companies. Global development finance institutions and funds are ready to offer long-term support (both equity and debt) at affordable rates to projects like solar energy and hydropower.
Green finance can positively affect environmental quality, economic development, and financial issues that promote the green economy, such as reducing greenhouse gas emissions, improving energy efficiency, or enhancing the organic economy.
On the basis of the given text and common understanding, answer the following questions:
Study the given molecular structure of double-stranded polynucleotide chain of DNA and answer the questions that follow. 
(a) How many phosphodiester bonds are present in the given double-stranded polynucleotide chain?
(b) How many base pairs are there in each helical turn of double helix structure of DNA? Also write the distance between a base pair in a helix.
(c) In addition to H-bonds, what confers additional stability to the helical structure of DNA?

Draw a rough sketch for the curve $y = 2 + |x + 1|$. Using integration, find the area of the region bounded by the curve $y = 2 + |x + 1|$, $x = -4$, $x = 3$, and $y = 0$.