please answer properly

4. The condition for optimizing the management of a forest is given by: AV = r[V(T) C] + r5 [1] Equation [i] can also be expressed as: av _ 2 V(T}C+S _ T [ ] a. [5 marks] Explain clearly the meaning of equation [I]. b. [5 marks] Explain clearly the meaning of equation [2]. e. [4 marks] Explain with the aid ot'a welllabelled diagram how an increase in the discount rate will affect the optimal rotation period. (:1. [4 marks] Explain with the aid ofa welllabelled diagram how an increase in the cost of harvesting a forest will affect the optimal rotation period. c. [4 marks] Explain with the aid ofa welllabelled diagram how an increase in the price of timber will affect the optimal rotation period. t'. [4 marks] Explain with the aid ofa well~|abel|ed diagram how the presence of positive externalities will affect the optimal rotation period